The Better Mod. It caused a account purge and probably the largest chainban for being one of the most malicious addons in blockland.
one time i made an addon that filled all of the default folders with huge amounts of spam files with random extensions and names in the background without lagging the game, slowly and silently filling up the harddrive
needless to say i never released it but it was a pretty bad addon imo
Thats not an addon, thats a virus.
Edit: Blockland Glass might be on the list in my opinion.
