Minecraft Tutorial Playlist ► www.youtube.com/playlist?list=PLEB388783144C45A8
This video will show you how to build a contraption that stops enderman griefing your world by giving them invisible barrier blocks and removing them when placed down by the endermen.

Commands
/scoreboard objectives add block dummy

1: fill ~ ~1 ~ ~3 ~1 ~ stone

2: fill ~ ~-1 ~ ~3 ~-1 ~ redstone_block

3: scoreboard players set @e[type=Enderman] block 1 {carried:0s}

4: execute @e[type=Enderman,score_block_min=1] ~ ~ ~ fill ~-2 ~-2 ~-2 ~2 ~2 ~2 air 0 replace barrier

5: entitydata @e[type=Enderman,score_block_min=1] {carried:minecraft:barrier}

6: scoreboard players reset @e[type=Enderman,score_block_min=1] block

Optional Commands

/scoreboard objectives add timer stat.timeSinceDeath

7: execute @a[score_timer_min=100] ~ ~ ~ fill ~-2 ~-2 ~-2 ~2 ~2 ~2 air 0 replace barrier

8: scoreboard players set @a[score_timer_min=100] timer 0

Gamerule Commands

/gamerule commandBlockOutput false
/gamerule logAdminCommands false