Been pondering something in my head. I have a newish site with growing traffic. It's mostly articles and news driven, and we want to add the facility to comment on a article.
However we can't work out whether we should make a user register to make a comment, by registering we can have a nice system where you can see a users posts, reduce the spammy commenting, have a "user profile". But on the flipside it might put people off commenting (although registration would be exceptionally simple)
Yeah, writing something to auto-moderate to a decent standard isn't the worry. I feel though if it doesn't put people off by registering you can offer everyone a much better experience with, well things you can see on WebmasterWorld. ie the user profile, recent comments etc.
Many many pro sites require you to register prior to posting comments and that is largely related to spammers. If people really desire to comment on article that interest them, they will register. and yes keep registration simple as possible.