Hey @Account Closed.
I haven't seen too much political backlash (SF, Oakland, Berkeley) other than the fact of: don't buy a home as an investment in a rent-controlled area when occupied by a little old lady! ;)
Some investors/home owners will try to game the system to work around it...but the penalties are just way too stiff. Of course, the tenants don't need to be little old ladies...there are plenty that fall into the protected classes. In my opinion, it's just not worth it. And likely not worth the bad press either.
I've seen REO properties sit on the market for a long time at ridiculously low prices, all due to the simple fact of a tenant living there that doesn't want to give it up; even if they're not really bonafide tenants. A tenant will likely get free or no cost legal assistance/representation and the property owner will need to pay full retail cost of an attorney and legal fees to battle things out.
I don't know if I answered your question, or just expressed my 2 cents on the matter ;).
Cheers!