i found a way of making a lag bomb without destroying your server but it sure gives a hell
one day i was messing around with boats i was trying to make a boat tower
i put wool 3 block up and i right-clicked the highest block with boats then when i touched it it freezed my computer
i right-clicked the block with boats (cos' i have toomanyitems) 100 times and it completely froze my game and maybe if you right-click it a 1000 times and a greifer touches it his computer will be screwed up and be thrown int the junkyard