I have so many thoughts on this. Not a show goes by without me interacting with wrestlers. That was the point of the afro years ago - to draw their attention. That said, I never cross the line into personal, racial, or religious. Gotta keep it character based.
I can make a long list of wrestlers who have "interacted" with me at indy shows. Whether its yelling back, ripping off the afro, or grabbing a sign from me, it's all been part of the show. And you have to roll with it. If you want to be "part of the show", you have to know the line. Heels are assholes. They flip hats, they rip signs, they insult your mother. Touching the wrestlers is wrong. You don't throw watermelon back at Gallagher.
By the way, the whole thing looks like a work. Look how the fan feeds his back to Joe Black who clubs him with forearms. No uppercuts, no chokes, no real fight moves. Compare to when Seth Rollins choked out a mark who jumped the rail on RAW.
If it is not a work - life is a work, btw - that fan should be barred from that promotion forever. But there are other promotions and the odds he and Joe Black cross paths again will be pretty high. Then when Joe Black and the boys whoop his ass (the whole locker room, because if you mess with one, you mess with all) , the way wrestlers would have back in the day, he will learn not to teach the wrestlers.