Possible Duplicate:
What's the best way to protect your house from Enderman stealing your walls?
Although I haven't yet had anything serious happen to my mob trap, with 1.8's release I'm worried that an Enderman might spawn inside my trap and move a block to completely destroy the trap's effectiveness or worse, release the mobs out of the trap into my house!
Is there any guaranteed way to prevent this, or do I just have to hope for the best and be prepared to play damage control?