Unsportsmanlike (taunting) or not?

[Opie]

I attended a college game Saturday night. A kid returned a punt for a touchdown. He was well ahead of K pursuing him and dived into the EZ, which drew a flag from the R. Then the kid proceeded to run past the opposing bench taunting them as he ran by, drawing a second USC flag.

Then I loved what the R said when he got on the mic " There are two dead-ball unsportsmanlike conduct fouls on number 21 of the return team. He has therefore disqualified himself from the game. The penalties will both be assessed on the kickoff."

After the successful try from the 3, they kicked off from their own 10 after the two USCs were marched off.

I'm a Fed guy and not real familiar with college rules so I'm not sure if this all was right, but I liked the R indicating that the player had disqualified himself and not that he was just ejected or we ejected him.