Quote Originally Posted by Rynjin View Post
When dealing with someone on the phone, you could potentially jar them into being quieter by simply being loud and belligerent back. If they're on a business call and need to keep up professional appearances, having someone loudly bark "SHUT THE **** UP" or simply shouting embarrassing phrases directly into their microphone might shock them into being quieter as they need to apologize/clarify to the person on the other end. Similar to how your friends might have screwed with you while you're on the phone in school.

YMMV on reactions, however.
As tempting as this is, I feel like responding to antisocial behaviour with antisocial behaviour is likely to cause more problems than it solves in the long run.