I think it's much more likely to go the other direction. You get on the radar by being sloppy, and then they figure out what your profile is and use stuff you posted as extra evidence against you. So yeah, be careful what you post, but I doubt they'll be showing up at your door based just off your posts here. I just don't think cops are on here trying to figure out who each of us are, even the best on here are still comparatively small fry in terms of what law enforcement is after, and I think most cops would probably feel kinda silly like they are browsing a pot site at work. If they were gonna grab you on here it wouldn't be from sleuthing your pics either, it would be by becoming friends and asking you to send/trade them something illegal so they have solid evidence and an address to link you to.