mdf: I've not heard any suggestion that it's illegal. Though with F1 you never really know.
Never happen lol
Red Bull double diffuser...
Ferrari injecting oil for a pre ignition to make ignition more efficient...
6 wheeled F1 cars, adjustable suspension...
The list goes on. But on a serious note, I would assume the regs are policed. The car design is open, you can see it, there are stewards that vet the car. Ferrari the oil issue, found to be illegal, just told to stop it, but it wasnt visible. Mercedes wise they made an awesome powerplant, although oddly, it benefitted them far more than any Mercedes powered team...
While I take my hat off to all the above, its innovation and creativity, todays RBR is just a well made car, not great in anything, but 9/10 in everything, and as a fan thats pretty cool. Its not a world beater in quali, not No.1 in the speedtraps, its powerplant doesnt pull the most horsepower, but overall its very good. The other teams have their own weaknesses which they will solve, but no one has 2 seconds per lap to catch up. Like Mercedes, but like the as boring Schummy Ferrari era they earned it