I don't buy they skipped Buium b/c of his agent, nor b/c of his size (he's 6'0 and probably 200 lbs when he hits the NHL). I think they probably saw his ceiling in the NHL as a 2nd pair/PP1 QB, a good but not elite player - time will tell us if they (and the other teams that passed) were right.
In the same way, I think Gauthier didn't stiff the Flyers b/c of Torts or some other imaginary reasons, he and the team wanted him to play center, and he needed that second year of college if that was his goal (more lucrative position). My suspicion is he had the leverage to do a "Fox" and took advantage of it to get traded to the West Coast (he's from Arizona).
People love conspiracy theories, but often the truth is not that complicated.