The club have my name, address, email address, telephone number and bank account. Probably more stuff beyond that too. And various details of my children too. They'll have details of every ticket I've bought from them.
By getting me to flash a debit card at them at some point in the future at some away ground or other - they're not finding out anything they didn't know anyway.
All valid points. But now it seems that we should be accepting that a business that NEEDS us as customers can tell us what to carry and show if requested when going to a sporting event that is not even happening on their property, or be prepared to do so at a later date. Strange times we live in