Recently I got stopped at the alarm barrier at a supermarket because the cashier on the checkout didn't spot and remove a security tag. I was in a hurry but I cooperated anyway. Considering that I had paid for everything and was not committing a crime - did I have the right to just tell the...

I'm reposting this with clarification. I recently posted this on uk.answers.yahoo.com believing that I would be dealing with English users talking about English Law. Several kind and helpful people answered - but they appear to be talking about the US. Please consider the following with...