I'll be watching my back then. I don't want that to happen!
Post it notes tend to have a habit of sneaking up on you and then cinging bat-like to your back waiting for someone to notice them and say, "Say, you have a post it note on you!"
Prompting everyone to go, "OMG! Where?!"
Followed by frantic 'get it off me's and "run fer yer lives."