NO to max ride height 
. I do however agree that this is an issue and I accept that I sometimes unwittingly take advantage when I turn in short of the apex.
The reason I say no is that policing a max ride height would be difficult and subjective and people may have to insert spacers in shocks to limit extension and/ or change shock positions that affect the handling or may not be able to due to limited adjustment available on some cars.
Propose that we need to improve (raise the height of) the circuit mark out barriers as Scott suggests. This will also solve the problem for when people get shunted, so that they are not knocked onto the other side of the track in the path of other cars.....
Would rope be a solution? This could still be taped down but would also be easier to lay out. May be too bulky for storage though and not sure on cost....