I for one was signed up for Elkjøp kundeklubb membership unbeknownst to me. It happened when I was picking up a water cooker. Seller asked if I would like an electronic receipt and asked me for my email. That was in Elkjøp at Solsiden in Trondheim.
The more annoying is that I gave him my regular email address and not a generated alias that I always give to companies.
Was super pissed when spam started landing on my main address.
If I need to buy something at El Giganten (Danish version) I speak English when paying, and tell them I'm a tourist and don't want to give them a phone number or email. They can print a paper receipt.
But I only buy from there if it's the only option. (Other than Amazon, which I refuse to use at all.)
It's really pathetic, isn't it? These guys hate their fellow Americans so much that they think it's better to allow companies to abuse people instead of stepping in to protect them.