See also: How to deal with persistent Spam-Users?
I know of a similar question here, but it does not really answer my question:
How to deal with users which have just one purpose: Spam?
On SuperUser.com there are 1-Rep-users which are just posting links to commercial products, most of the time it's about Data- and Password-Recovery tools. They're human spammers, though, the answers are always different but always are containing the same link. By now I always flag one answer as "Needs moderator attention" and add "Spam-User" as comment. Is this sufficient or wrong?