IMHO, the most basic concept in the whole game is discretion.  When that is violated, how could anyone think their not subject to be next.  You didn't say whether there was lasting harm other than the obvious embarrassemtn.  But, if not, there certainly could have been.  It could have been ugly as hell, could have wiped out a personal relationship or marriage for the girl.  Sorry, but this behaviour is just so wrong that it cannot be tolerated.  This girls privacy far outweighs this guys ego to act like the "man on campus".