http://news.ycombinator.com/threads?id=azrealus
I should clarify: accounts with this usage pattern seem to be common practice for spammers, that have been discussed on HN before.
azrealus, if you are a real person, I apologize for jumping to conclusions. I certainly have no problem with a real person, usage frequency isn't important - although it is preferable to contribute something to the discussion more than "I agree", since an upvote signals that.