Please. PLEASE PLEASE change mob greifing for all mobs off. Endermen greifing is on, but creeper isn't. Endermen take my blocks from pigfarm and down the drain goes lots of money. I had to move it once, nope, again, nope. PLEASE
It's also annoying when you have diamond blocks like in 2x2x2 and they steal every every block and you lost 10000$ plus
Like rostw said. Also, if you have a natural mob farm and that's where the endermen are coming from, make the grinder where the mobs spawn 2 blocks tall. It will still work.