How does Fluther deal with accounts created for marketing purposes?

Sometimes when a Rembrandt award catches my eye, I notice that the new user’s name looks… well… sort of corporate. When I click on that person’s profile, more often than not, they’ve left an advertisement and a web address.

We don’t have a mechanism for flagging these profiles, but I’ve noticed mods mention booting spammers based on their profiles before. How do they notice? Or do the mods have to wait until the first spammy question or answer before the offender can be removed?