Some billboards are inappropriate, but if you live here you stop noticing them after a while. I lived in Milwaukee while in yeshiva for 7 years (no billboards) and when I came back to LA it was a shock seeing all the billboards.
I agree that people are a lot more relaxed on the West Coast than elsewhere in the country when it comes to frumness/tznius. People might dress scantily in the 70s, but in Milwaukee if it hit 40º in March people were running in shorts and t-shirts too.
One of the big problems facing the community here is the high cost of tuition. I agree that way too many people spend all their money on stuff (cars/houses) and then need financial aid to pay the schools. I don't know if this issue exists elsewhere (ie Brooklyn) but I assume it does.
Anyway, the good weather doesn't come free; we have to pay for it somehow.