Annoying Anons

Alright, listen up, buttercup. The joke is a simple pun. The word "Anons" (referring to anonymous users, probably on the internet) is twisted to sound like "annoying." It's funny because it's stating that these anonymous users are annoying, and the words sound similar, so the joke is supposed to be funny for that reason, idiot. And you are probably laughing because you are probably an "Anon" yourself, which explains why you're so easily amused!