It has to be said, unintended consequences are never far away in the world of F1 rule changes. For just one example, take a look at how quickly aerodynamic flick-ups have resurfaced, despite their supposed banning. Skate fins? What on earth?

Now we are presented with a number of oddities that have come about as a result of this season’s new testing restrictions. In-season testing is banned completely. Each team is limited to 15,000km, but according to James Allen it looks as though no teams will top 10,000km, because this year’s testing events have been so heavily disrupted. Teams that go to Portugal and Spain get relentlessly rained on. Those that go to Bahrain are treated to sandstorms.

Moreover, what little testing time there is has been eaten into by the need to test 2010-spec tyres. The bans in refuelling and tyre warmers coming into effect next season will put different demands on the tyres. As such, Bridgestone need to get data so that they don’t end up barking up the wrong tree as they develop the new tyres. But with no opportunity to do this later on in the season, some teams (McLaren and BMW) have had to sacrifice some time from their already tight pre-season test schedule.

Now McLaren’s test driver Pedro de la Rosa has expressed concerns that the lack of test time is actually dangerous for reserve drivers. Should a reserve have to come in for some reason, he will be thrown into the deep end, straight into the action having had little experience of the car. That would be bad enough in a normal year, but with the radical rule changes that have come into force this season you can expect out-of-practice drivers to be even rustier.

Now it is becoming obvious that the testing restrictions are damaging the careers of young drivers. All winter, it had looked as though Rubens Barrichello’s chances of retaining his seat at Honda / Brawn were close to zero. Reading some reports, you’d believe that Bruno Senna was practically a shoo-in.

Now it looks as though Barrichello has been given the nod, leaving Senna with nowhere to go. The ever-excellent Grandprix.com trailed the possibility a few days ago, noting that “Barrichello is a better bet [than Senna] as his experience will be useful in a year when there is little opportunity for young drivers to learn how to drive F1 cars.”

From this perspective, it looks like Honda / Brawn have made the right decision here. Moreover, Barrichello outperformed Button last season, and it would have been a real shame if Barrichello’s career ended with a snub. Mind you, there is the risk that Barrichello will have a David Coulthard-style final season of doom, and we wouldn’t really want that.

But what now for Bruno Senna? Holding out for an F1 seat, he has more or less ruled out staying in GP2 for a third season. Indeed, it is difficult to see what he could achieve with another year in GP2. Drivers who spend too long in a category like GP2 tend to have their potential stunted.

In a sense, this is a predicament which is yet another symptom of the serial mismanagement at Honda which has deteriorated this winter to extreme levels for obvious reasons. Senna sounds pretty frustrated over this situation, and wouldn’t you be?

But any other year it would be no big deal. Senna could sign as a test driver for one year, as countless other drivers have done before, and spend the season racking up the miles on the test track in preparation for his first full season. And should he needed to replace another driver mid-season, he would have experience required of him.

Failing that, he could have gone on to make a decent career as a test driver. It may not have the glamour of a race role, and you can bet your bottom dollar that all test drivers yearn to race. But it is, at least, a decent income earned from driving cars — and they can always hope. People like Luca Badoer, Marc Gené, Anthony Davidson, Alexander Wurz and, yes, Pedro de la Rosa, have all made a decent living out of testing F1 cars. Felipe Massa started out at Ferrari as a test driver, and today he challenges for Championships.

Now what? All Bruno Senna can do is twiddle his thumbs. He can always suffer the humiliation of going back cap in hand to a GP2 seat. But this could backfire on him, and all the best seats have already been filled.

Could this be one reason why there is only going to be one rookie this season? Sébastien Buemi is the only newcomer to F1 this season, but he has done plenty of testing for the Red Bull teams and he is filling a vacancy that David Coulthard voluntarily left behind.

Remember when everyone was certain that Renault were not going to re-sign Nelsinho Piquet? Then, out of nowhere, they signed him for another season. Is that because, for all his faults, he at least has experience that the likes of Romain Grosjean and Lucas Di Grassi now cannot hope to attain?

Let us not forget another major FIA-instituted change for 2009, which is yet another instance revealing the lack of joined-up thinking inside the FIA. This season sees the inauguration of Max Mosley’s Formula Two project. Remember, this new feeder series was supposedly invented specifically to make it easier for young drivers to reach F1.

Well, it’s all very well adding yet another “second-top” rung in an already-cluttered world that contains GP2, A1GP and World Series by Renault among others. But the top rung now has a fundamental crack that will cause the ladder collapse when a driver reaches it, sending him — and his career — crashing to the floor.

There might be an allowance in F1 for “young driver training”, but this is no more than a fig leaf. A “young driver” is someone who has not tested on more than four days in the past 24 months. How is a young driver supposed to progress with such scant “training”?

Max Mosley likes to use F2 to make out that he is opening doors for young drivers. The reality is that this door leads drivers up the garden path. There have seldom, if ever, been as many feeder series as there are today. An F1 team can take their pick from 20+ GP2 drivers, countless A1GP drivers, anyone from WSR who takes their fancy and goodness knows how many F3 drivers. F2 isn’t needed, especially now that young drivers will find the welcome mat at F1′s door cruelly swiped from their feet.