I would advise seeking professional help and minimizing the amount of threads you make on these topics, like other people have suggested. Even if you don't commit a crime, every thread regarding these topics could become incriminating if you were to end up a suspect in something.
I don't think that you're a bad dude or anything for the issues and thoughts that you have, but I think it's time to start focusing on getting help and preventing yourself from getting in a bad situation in the first place.
Honestly, not to freak you out, but I'm worried that someone may see one of these threads and attempt to report you to the authorities if you continue posting about these things.