Flag abusive users
There is no "flag" link in user profiles which can contain links and summary written clearly to advertise.
Example from SuperUser.
Looking for fast cash? Debit card loans quick brings simple solution for all your swift cash needs without any credit check process.
There is also an URL but I will not make advertisement for them.
What about adding a "flag" link in profile next to website entry and the summary (about me) in the profile pages?