How good are those cameras, though? I've crossed from Marin at least 8 times now, each time with the "cash taker" lanes having no staff. I assumed it would be like in Houston, where you just get billed via mail, or can call and pay. Nobody I've called is aware of me owing anything on my plate, though, and I've never got anything in the mail.
Maybe I did my plates wrong... I also never received the ticket the angry SFO cop promised I would get for not picking up my friend fast enough.