Grapple knife DMs - no effort to make, rely on a stuffty add-on, and everyone likes them.
People dressing up like richards.
People who pretend to be having love.
People who repeat the same line in the chat 4 times by adding dots to the end for attention.
People who put a less-than sign before their message so it appears in red for attention.
People who talk in all caps for attention.
People who use an automated avatar changing script for attention.
People who run chat bots and auto-greeters for attention - are you seeing a pattern here?
Attention-whores in general.
People who accuse others of operating aimbots or hacking just because they are continuously doing well.
The "You can't hack Blockland" phrase. For the most part it is true, but I'm sick of hearing it because I'm tempted to explain it whenever I hear it because both the person saying it and the person arguing against it are usually clueless.
Guns that have no interesting functionality to them whatsoever.
Servers that try to encourage standard melee combat - It's about as involving as a game of rock-em-sock-em-robots in Blockland.