the only problem is FIA has clear the rules on chicane now, but they havn't done sh*t about drivers pushing each other off the track.
as I said in the Spa discussions, as far as I can remember during my 10 years or so of F1 (not a lot compare to a lot of ppl~ lol), I can only remember Heidfield got penalised for pushing DC off the track at Bahrain. And that was ONE penalty out of a lot of pushes...
CRASHING into another driver is a different story of course... but sometimes, pushing and crashing is just a very fine line away from each other...