- You close the door of the toilets. You do have something to hide (we all know what you're doing. you're hiding anyway)

"I don't need privacy because my actions are questionable, but because your judgment is" (think dictatures, wrong guys at the top of the decision pyramid, 2nd world war ..)

... Oh. And BTW. I'll be making some copies of your keys to give to a bunch of others interested in placing adds on your coffee table (or so they claim). I'll also go through all your drawers to see if I can't find any other keys/access cards/... to gain access to your office or your colleages' offices, friends' or family's homes, etc. just so I can provide them with the same adds "service" as I intend to provide you. Of course I don't remind you of any of this. Nor do I tell your colleagues, friends, family, etc. After all. What you don't know will aid me and what they don't know will aid me. ;-)

If we're entering a valid contract under the justice system of our country of residency, why not? Similar services already abound, in particular around people who contract to visit and attend to older citizens.

Then again I'm asking as a European citizen living in a country with a comprehensive legal system, a functioning police force, cheap insurance policies, so on so forth. Certainly that ecosystem plays a role in our inner fears.

im not going to get into any of the better arguments right now but one thing i like to ask when people say they have nothing to hide is "what kind of things are people looking for?"

I think its good to get a handle on what the person knows first before you start throwing out counter arguments. in a lot of cases people don't even know whether they have something to hide or not and are just repeating what they have heard others saying