Sorry if there is a more appropriate forum, but I signed up specifically to try and get people to mass-report the guys selling FlightGear as their own product re-branded.
I thought they'd been stopped but I just today saw another one of their ads on Facebook.
You can quickly mass-report a lot of their videos by going to vimeo.com and searching for "flight simulator" - their videos are recognisable as a random man's face staring into the camera, or a FlightGear gameplay video (with proflightsimulator.org branded on it, or somesuch). Report them as "Money making" or "Gameplay" as appropriate. Helpfully, once you find one, you can find a lot of the others in the "related videos" panel. The report link is down the bottom left, but after I'd logged in, I had to go to "Tools" up the top menu to report videos.
Also here are a bunch of Facebook groups you can report as a scam, which I found just by searching "flight simulator plus" in Facebook.
http://www.facebook.com/pages/Flight-Si ... 8454732084
http://www.facebook.com/pages/Flight-Si ... 5300415632
http://www.facebook.com/pages/Flight-Si ... 1082509219
http://www.facebook.com/pages/Plus-Flig ... 2933779570