Spam Removal Procedure

A couple of times now I've watched a newuser create an account and then use it to post inappropriate or off-subject commercial content. As soon as I catch it I roll it back, but I don't do anything else, like warning, blocking IPs or usernames, sending a notice, etc.

What is the procedure that's been established? Is there a bot that picks these things up on its own? If so, should I let the bot take care of it?

Please let me know what's been more or less agreed on and what procedure I should follow. Thanks! --Starfarmer 12:04, 29 April 2010 (UTC)