You need to start replying in the same "code" to let them know you are on to them. Might want to also include lots of "beeps", "boops" and whistles. Another thing that might come in handy is to ALWAYS stand on just one foot like a stork. Flap your arms a lot like you are getting ready to fly away. Also, every time you say something, cup your hands around your mouth, but whisper. Oh, and constantly make fart noises if you aren't doing something else, especially if you are somewhere like a doctor's office, restaurant or other public place where people are generally minding their own business. Never wear matching shoes and only shave half of your face, flare your nostrils at every opportunity, and don't forget to loudly announce every trip tothe restroom, both before and after, using colorful language.