I personally hate chatrooms that censor the conversation (apart from outright harassment of course), and at the same time I've had a hard time finding popular and active chatrooms for people who are open-minded in that particular way.

Probably because alot of people discuss subjects that they'd feel comfortable discussing in a milk bar whilst eating their fish and chips. There are networks that allow a free for all and others that don't so complaining about the ones that don't is pretty pointless.