We did have it completely open for awhile, but not even counting people here, we started getting folks from other IF/writing communities joining only to get offended and go run and tell everyone how horrible we all were. It's like you could've just looked at the forums and saved a trip.
There were a few folks that tried to troll, but that never really worked out for them.
Finally we started getting weird folks just wandering in from wherever. Which pretty much resulted in kicking out the degenerates and the open doors experiment was shut down.
Probably the most entertaining of that lot was some nurse that wandered in bragging about being into erotic roleplay and was generally a dumb whore. She'd sometimes go on about how we weren't "hardcore" enough. It's like "Ma'am this is not that sort of writing community. You took a wrong turn somewhere."
Might have kept her around for lols a little longer, but she fucked up someone's Minecraft server so she got kicked for that.