Debatable if Whittingham "can" actually do that without penalties. He's definitely complicit in fomenting the victimy tantrum culture. When the game's done, don't egg on fans by doing that stuff.
Very much agreed that Harlan was well beyond the pale. I'd say it was criminal trespassing, just like any other non-coaching yahoo with a sideline pass who's angry at a call can't run onto the field during a play to yell at refs. Harlan really should be charged criminally.