This is a big issue. I cycle to work everyday (Oakland) and there are at least a dozen people parked or stopped in the bike lanes. The big issue is that there is no where to stop. Parking is cheap/free and not time limited so most cars don't really move and the very few short term spots aren't ever enforced. You can drive around for 15 minutes looking for a spot or you end up in the bike lane. This isn't good but its at least somewhat understandable. This is the case around transit stations and busy restaurant/commercial streets.
