I work for a large company. The site I am on has several thousand people on it.
Some of them are stupid.
To be fair, I think it's the group-think effect that creates corporate stupidity where no one has the gumption or the energy to stand up and say "this is a dumb idea".
The latest example of this happened today. We've been in the current open-plan office for about 2 years. Someone, somewhere felt the need to arrange to have two guys come round and hang signs saying "Exit" from the ceiling pointing to the doors. The signs are 2 - 3 feet from the door and now get hit by them when you come in (just waiting for them to fall off and hit someone). Now, maybe I'm uniquely advanced but I can figure out that a door is what you use to go out of and I know what the door looks like. Especially when the only way you got in the office was using the door itself (Windows aren't an option, they don't open and we're on the 3rd floor).
To help people further I've stuck a post-it note on the door with "Door" written on and one with an arrow saying "Handle".
This is the same company that arrange to have a 100% blind man work as a web designer !!
I kid you not.