Forever alone guy wants to be disturbed any time possible.
What could someone possibly do with a door other than enter and exit?
The bees have set up camp here so we won't disturb them.
You are not an infidel? Then out with you!
Although it looks just like one, this is not a door. Trust this sign.
And there is your room. Good luck getting in.
Are you part of the stuff? Are you stuff? Then you better not enter.