Slightly OT (though I\'d gladly give anyone a cookie who can remember the original line of thought here) but the way I normally judge a spammer stems from the Cabal days. When you log into the guilds forum and the last post in EVERY thread is by the same person...
(Ah, Savion, how we do not miss you...)
Edit:
On a different random note, I love the tripod advertising on the metal milita website.
Example We are the Metal Militla!! (blah blah blah)
We are an ancient army of doom!! (blah blah blah)
Shoot the watermelon to win $1,000!!