1. SpamBots
2. People that join games to ruin them in some sort of way, either by spamming, leaving, or drophacking everyone at the same time.
3. LKSJDGVDSGVGH -- games you have no idea what the f**k they're saying with hosts who have no idea what the f**k YOU'RE saying.
4. Mentioned before -- Frost@USEast > YOU.
stay away from him!!
5. People who think they're cool over battle.net
6. YO. SUP DUDE. DUDE. SUP. WADDUP DUDE. YO LES GO GAME DUDE. YOOOOOOOOOOOOOOO
7. Spoofers. Who wants a fruity colored name in a game that doesn't even show up in the game itself lol?
8. I play west, so this is is a huge pet peeve; TEMPLE SIEGE, TEMPLE SIEGE, SNIPES DM, SNIPES, SNIPES, SNIPES, HASLFJASKJF, FSDKFHSDLKFJSDF, DSFKHSDKLFJSD.
9. People who come to the U.S. servers that have no idea why the hell they're there, but stay anyway.
10. All melee games being 90% korean hosted.
11. People who have terrible grammar, and abbreviate EVERYTHING. "ig2g, ttyl my bff... LOL TATS AWSUM"
12. The amount of help that Battle.net tech gives you. "Go here and type 124545."
13. Having to do the lat trick every damn time I want to show somebody something.
14. People who join a clan and disease all activity. What-so-ever.
15. Someone who takes a map, edits it slightly, puts their name in, and gives it to 50 friends who do the same. Yes!!!! We have 200 Marine defences now! F**k yes, my FAVORITE MAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
16. Spoofers that join, leave, and come back with your exact name, and completely make you look like an ass even though it's not you D:
I'm sure I can think of more, but not right now. Basically everything everyone said before + this xD
None.