Are you not sure why people hate you on BL? Do you want people to like you? Read this!
Building
When building, use more colors than Red. Don't build with 1x1x5s unless necessary, building with entirely 1x1x5s makes Men have Periods. Don't make the Roof on top of 5 high Bricks(Don't make it so you have to crouch to sit in a chair). Don't make lowly detailed builds(Example: Don't make Outhouses with no Toilet). Don't make your builds boxes. Don't make builds that are too simple(Example: Don't make houses with Beds made entirely of 1x1 Bricks).
Mini-games
Don't Spawnkill(Don't stand by a Spawn and just kill people when they spawn). Don't camp(Don't stand by a doorway and wait for an enemy to come, then kill them). If you accidentally get killed by a Teamate, don't go crazy and rage. If you accidentally kill a Teamate, say something like "Sorry!". If in a Mini-game with lives, if you run out of lives, don't leave the Mini-game and come back just so you can play.
Emitters
Don't place bricks with Emitters everywhere and eventually crash the Server.
Bots
Don't get Bots all over that do stuff, you'll probably get Banned.
Mini-Nuke
Don't use the Mini-Nuke everywhere.
"You can swear at me, you can scream at me, you can stab me, but I posted this! Not you! Me! ME!!! (Laughs maniacly) - Blockster20080, 5:22 PM, 9/8/11