No one likes to be on the receiving end of a scathing insult, but it can be supremely entertaining to watch other people get burned - particularly when their logic or empathy feels lacking.
As suggested by its title, the subreddit Murdered By Words is dedicated to documenting the most succinct, brutal, and well-sourced verbal smack downs, and there is no lack of those floating around on the internet.
If you're feeling vindictive and need the catharsis of a battle of the wits, or you need inspiration for how to best your enemies, these will likely give you just what you need.