While Entitled Dicks do make excellent comedy fodder, in real life they're so grating that most cheese shops file for restraining orders as soon as they roll into town.
With people like this, it's often better to just ignore them until they wander away in search of more evenly fake-tanned people to annoy. However, should someone feel a slight pang of social justice in their black little heart, I guess an alternate way to take care of this shit would be to acquire every piece of nonlethal weaponry you can. Pile up mace, net guns, fart cannons ...
... totally nonlethal giant murder robots ...
Only, absolutely don't use any of them on the Entitled Dick. That shit is illegal as all hell, unless you have a pile of qualifications and there are very specific mitigating circumstances, which, let's face it, you don't have and there won't be. Besides, if their entitlement is purely narcissism-based, they already know they're obnoxious but just don't give a shit. If their upbringing is at fault (and in tons of cases, it totally is) , there's no way you can undo that shit with a Taser, no matter how hilarious and satisfying it would be to give it a shot.
However, if you were to drive to the house of the Entitled Dick's parents and scream at them until they promise to think twice about the necessity of that trust fund, is it really your fault if your trunk accidentally pops open and they see the arsenal you could technically have at your disposal if you were a complete sociopath instead of the morally upright concerned citizen you clearly are? If they reply to your reasonable request with mad ramblings such as, "Our kid is just fine," and, "We're calling the police," is it really your fault if that beanbag gun inadvertently goes off and hurls a round you may or may not have accidentally slathered in habanero sauce at Mr. Entitled Dick's dick?
Yes. Yes, it totally is. Still, as the cops drag you away, you can at least take solace in the fact that you've pretty much guaranteed a fairly serious discussion between daddy and the little turd that is the fruit of his temporarily decommissioned loins.
This picture brought to you by the search term "decommissioned loins."