Hey betlista, Thanks for your concern!
You can just mark their comments and posts as ‘spam’ if you have the required karma points. Or the admins will remove it while monitoring the forums and take the necessary actions.
What karma do I need for this? This user (http://discuss.codechef.com/users/1721/fourerjob1) is spammer too.
i deleted this one ; http://discuss.codechef.com/questions/632/franchise-plumbing-supply
I spotted one spammer user id: @vipsharmavip
suspend this guy,
refer the above link for spam.