When A Sign Resigns

At work, there's a floor-to-ceiling whiteboard in the conference room.  The whiteboard is the wall and the wall is the whiteboard. For anyone who ever wanted to write on the wall (without getting a timeout by their parents), here is their chance. 

Attached to the wall itself, high up and near to the ceiling, there is a sign stating:

"This wall will be cleaned every Monday morning at 9am."

As long as that sign is still posted on the wall itself, the facilities employee responsible for cleaning that wall will never have a perfect performance review. Will they?  I guess there's always room for improvement.  Now, will someone get that guy a ladder?

This gave me a great idea.  For fun, make a sign that simply reads in large bold letters on bright paper: "Remove This Sign" or "Don't Remove This Sign". Removal of either sign will be done with some uncertainty. Make hundreds and post them all over your workplace and watch...