Let me guess... FutureShop?
Superstore.
I bought ~$100 worth of groceries into four of my own bags, so they were heavy and I was carrying two in each hand. Middle-aged lady asked to see my receipt as I walked from the cash to the exit, I said "no thanks" and walked around her and left.
I've also refused to sign the payment contract for my gym because it was shoddily written, as far as I can tell there are no repercussions to that.