I have been thinking about this today.
I am 100% behind you and I am just on the tipping point of trying to do something like this myself.
If you get a petition up I will sign it. If the accepted approach for the 'Council of concerned parties' is to write to BMW with our concerns, then I will do it. If we have to hound dealers etc, then I am happy to do so.
As the wheel situation proved - it IS possible to make this kind of thing stick if enough people kick up a fuss.