This is a non-post, as it doesn't even bring its own analysis to the table. What are the valid concerns against card payments? What is so great about cash?
The convenience of card payments heavily outweighs the (i assume privacy) concerns. So what if anyone knows I stuffed myself with an unhealthy amount of chips? I keep my cash for things that don't accept other ways of payment, like bus fare and my drug dealer.
I see your point, though. It isn't solely applicable to this issue; any discussion is mudded by disagreeing just for the sake of rejecting anything anyone with an opposing view on a distinct and unrelated subject.