> "so I'm on this specific Red Hat version, with this oddball graphics driver and three monitors and full-screen doesn't work with your game properly"

It simply isn't possible that there exists a technophile out there patient enough to set up such a non-Ubuntu rig, yet cave-dwelling enough not to thank their deity for the simple fact that any graphics-hungry software turns out to run at all without crashing.

Barring a copy of the original email and video testimony from the sender, it's more reasonable to believe this was someone trolling you (or perhaps even a team of someones if you received more than one such email).

Edit: clarification