You guys are much too gentle......
After we got him down, I'd pants him. While others are beating the tar out of him, I'm going through his pants and getting out wallet, car keys, phone, what ever. I am taking every bit of cash from the wallet. I will take photos of every credit card in that wallet, as well as the driver's license. I will take the keys off the key chain one by one, bend them or break them, and toss them out into the audience. Having this person's info, I will use it to press charges and start a civil suit to sue them for the cost of my property damaged and loss of work. If this person has any drugs on them, I will turn it over as evidence for a criminal charge against them from the local police. I will also use the person's information to notify their employer, school, and parents of this idiot's dumb move. I will keep the phone, and download all content to be used to shame or blackmail this person until after their death. And that's just the beginning.....