Just don't post anything identifying, and don't think with your dick instead of your head and go rushing into some rl meetup.
The police have better things to do than come busting down your door simply for being on a particular website. Just don't give them a pressing reason to come hunting you down.
The "real" danger comes from revealing too much that will allow OTHERS to identify and hound you to other online communities, or worse into real life to expose you as a zoo and ruin your life.