I guess if he was someone the NCAA considered a booster and would have searched this guy out for the express reason of talking about his kid it could be an issue, but a casual conversation during an established relationship shouldn't be a problem.
Still, reading all those rules really makes you wonder how much innocent stuff could be considered wrongdoing, a high-level season ticket holder bumps into some random parent of a stud kid at a store and says "Hey, Bobby needs to come to Dipstick Tech" and that would be considered illegal? Scary stuff.