While doing some flagging (yes, I'm a little bit addicted) I stumbled upon the user StarWind Software. At first the case seemed clear, Spammer, but...and that's a big one, he seems to be a productive member of SU and SO (his account on SF isn't there anymore, but it's still in the Data-Dump of the explorer, not sure what happened).
He does never seem to link against StarWind-Software, except with his name and profile. He also stated himself that he's a developer there...so...at what am I looking here? I can't really place him somewhere.