He only has 15 posts. A few of them are legitimate posts, say 5. That leaves 10 spam posts.
Anyone with a history of 66% content-free posts would earn a place on my ban watchlist.
This user already has.
From Guidlines
Spam
The following are considered spam:Very short posts that do not add value to the current discussion.
Double posts. If a member posted something and you realized they made a mistake, use the edit/delete option.
Off topic posts will be either removed or moved to the appropriate place, depending on moderator.
Posts that obviously serve no purpose other than uping one's post counts.
Posts like "XXX, I have a question for you" are considered spam. They should be done via private messaging.
Any other posts that we deem inappropriate for other readers.
Responses to spam posts should be considered as spam and be removed. However, spam warnings should not be given in such cases except in severe cases.
Posts that contain large amounts of smileys and/or spaces to make it look like they contain useful information often don't. Give out official spam warnings to repeat offenders. Give a bit of leeway to new posters (you can tell by their join date).