What funny responses could you give to any unwanted attention from a secret admirer?

They think you don’t know who they are but you do.Let them down gently? Perhaps the humane responsible way to deal with them.Let’s for arguments sake though say they have gone beyond flattering & irritating.They’ve jumped warp speed right through to full blown “stalker” syndrome.Won’t take no for an answer.It’s time to act. Hit them with your wittiest, withering stop dead in their tracks put downs.Cruel to be kind.A hypothetical scenario whose motive is purely to seek out fun imaginative responses, okay?