Yeah, but there also just might be a stupid person like that out there actually.
Had a friend once, who had always very strong opinions on his views and whenever he was proved to be wrong - he bringed out even more stupid theories and usually crossed the line of common sence, but he never backed down.
Why would you want to abuse the report system? The moderators (incl. devs) are pretty active on the forum and can't have surely missed the said user's many many threads and would have banned if there was a reason to do so.
Report a post if it breaches the stated agreement, but dont go reporting (or encouraging) other to report all his (or her) posts.
Yes, a lot of us are bored here and feeding the occational troll might be fun - but now it is just annoying. Just quit replying to those threads/posts...
This member has, for the first time ever on any forum, inspired me to make use of vbulletins 'ignore member' feature. This change has considerably improved the quality of forum posts and I fully expect further improvements as more use is made of it, highly recommended.