The user true has one point of rep and one answer on a question about games for uncompetitive groups. The original post seemed like a totally reasonable answer but embedded within it was a link to a commercial website apropos of absolutely nothing (it's since been edited to remove the offending link). The user's name matched part of the web address, which makes it seem like the account is fraudulent (as opposed to the answer being hacked).
Is this sort of thing relatively common-place? Other than editing the answer to remove the inappropriate link are there other actions that should be taken against the user account (perhaps for now just wait and see as it's only one offense).