For reference, here's what the FSF does
http://www.fsf.org/licensing/compliance
Basically they do actively investigate everything, and then file suit based on the violated parts that they do have copyright for. (bash, wget etc) while working with the other infringed copyright holders.
Maybe that model can be used for the WMF also, although I'm not sure if they have any component violated text.
Just FYI :)