Or just allow it to be legal in future. The cars did not seem to struggle following each other around the circuit today. There was plenty of overtaking to see, so they obviously aren't nearly half as disruptive as people like Flavio Briatore are claiming.
The problem here is that there hasn't been enough discussion, that I've seen, concerning whether or not the diffuser really should be legal, given an objective reading of the rules. If the loophole is valid, then they should be allowed. But if an objective reading of the rules shows that the diffusers have been wrongly allowed, then that's an entirely different viewpoint altogether. I'm not commenting on whether the diffusers should or should not be allowed as I feel that I haven't investigated the regulations and solutions to really know what the true case is. And I see lots of posts (not yours Denthúl) where people seem to apply quite spurious reasons for claiming that the diffusers should be legal or not.
The fault is with the FIA in my opinion, in either case. I do not accept that rules can't be written without all these loopholes in them. And I'm unconvinced that the "legality" decisions coming from the FIA and Charlie Whiting are always sensible. In that environment, the teams MUST try to exploit loopholes or be left behind by those teams that do.
I just decided to avoid the legal/illegal discussion on the basis that, having been passed by Charlie Whiting, Jo Bauer, the scrutineers and then the subsequent appeal being thrown out by the stewards, it is likely to be thrown out provided the FIA Court of Appeal don't make another stupid decision.
As for the loopholes, I agree with you to an extent. The rules need to be written and tested
thoroughly before being finalised to remove these loopholes. Alternatively, the rules need to be scrapped and innovation should be encouraged. Both courses of action would make me happy, though the latter is a bit of a dream.