Agreed; it's hard to execute trade in a society without abiding by the norms of the society regarding information exchange. I could also try walking into the 7-11 with a full face mask on (in my state at least, that's not illegal in general), but the owner and register operator really wouldn't appreciate me being that anti-social.

Privacy is a sliding scale and different people set the slider at different sensitivity levels.

And even if one's sensitivity level is high enough to cause personal problems, they're solvable. People that deeply concerned about their privacy have had proxy shoppers buy things on their behalf.