ethanol in gas bad for our cars?

I don't imagine that marine exemption's going to last too long. I used to be able to fill up my car with 100LL avgas, then that started being enforced but I could still fill up a few 5-gallon gas cans with 100LL, now that's no longer possible unless I am prepared to provide a verifiable aircraft tail number and other documentation for my intended application of the fuel.