So I found a mod that stops the enderman from picking up blocks. Get it here: Enderman Mod.
To install: you'll need 7zip (free) or WinZip (not free) to open your minecraft.jar file.
Go to C:\Users\[your user name]\AppData\Roaming\.minecraft\bin\minecraft.jar
Right click the minecraft.jar file and open with 7zip.
Once open drag the gz.class file into the minecraft.jar archive.
Delete the META.INF folder
Close 7zip.
Done! No more repaircraft and back to building.
I didn't write this mod so my thanks goes out to the original author. You can find his post and more info here. There is also a 1.9 mod and a mod that changes the enderman sounds.
.






