I think I just need a little clarification, because I'm a little confused by what you guys mean by "trolling." Because in most places in this post it seems to just mean "tagging," but then you have I WANT TO GET TROLLED, BUT NOT BY X/Y/Z. WHAT DO I DO?, which seems to suggest actually trolling with ill intent, which is why we would need to put up permissions to protect our characters from stuff we don't want them to experience.
Re: QUESTIONS