Prolific, you have not watched a lot of college basketball if you think what Randle did was one of the dumbest fouls ever. My opinion is it was a foul, but whether it's called largely depends on the propensity for the refs to call fouls in the particular game. In this one, the refs obviously were not shy to blow their whistles. So it made sense for that foul to be called in this game. But don't be surprised if you see something similar go uncalled in other games.
A couple of the dumbest fouls I can remember in recent years came in a Round of 32 game in the 2011 NCAA tourney, Butler's Shelvin Mack fouled a Pitt player shooting from halfcourt when Butler was UP by a point with 1.4 seconds to go. What's even worse, Nasir Robinson for Pitt fouled a Butler player after Pitt missed a FT when the game was tied with 0.8 seconds to go. Pitt basically lost a chance at a Final Four because of a stupid foul.
http://espn.go.com/ncb/recap?gameId=310780221
Jamelle Horne for Arizona twice fouled opponents right before the buzzer with a tie score near halfcourt in one season. If my memory is correct, on one of the plays he actually chased after the opponent and fouled him from behind to ensure that he would snatch defeat from the jaws of victory.
http://www.aolnews.com/2009/01/17/jamelle-horne-might-be-least-intelligent-basketball-player-ever/