I would think that in any decent courtroom, then eventually would, since those same protections apply to forum operators, chat rooms, picture sharing sites, etc. But I don't blame you at all for not wanting to be the test case, since that would probably be rather expensive and likely to disrupt your personal life.
Your ISP is obviously an ISP, and most law enforcement agencies understand that and that it means that if something dirty comes through there, then an employee of the ISP most likely didn't do it. But if you're using your home PC as an exit node... most agencies probably have no idea what Tor is, and would assume that you personally were doing whatever came through it, and would commence with the whole search, seizure, and media circus before they figured it out.
Your ISP is obviously an ISP, and most law enforcement agencies understand that and that it means that if something dirty comes through there, then an employee of the ISP most likely didn't do it. But if you're using your home PC as an exit node... most agencies probably have no idea what Tor is, and would assume that you personally were doing whatever came through it, and would commence with the whole search, seizure, and media circus before they figured it out.