Honestly, of the dozen or so ERAU grads I know personally, maybe 2 or 3 aren't total D-Bags. Not saying Riddle turns you into one, but it sure seems to be a magnet for them. I think smaller aviation schools do a better job of socially weeding out the douchey aviation-bros.
The biggest primadonna pilots I've worked with have one thing in common, and it's their alma mater. I blame it more on being in Florida for extended periods of time than anything...
How do you know if someone went to Riddle? Don't worry, they'll fuckin' tell you.