The dictator manager of one of Sainsbury's supermarkets threatened me. Hello everyone! Today I went to the Sainsbury's shop in 19 Selly Oak Shopping Park, Aston Webb Blvd, Birmingham B29 6SJ. I took a photo today while shopping at Sainsbury's, then recorded it and sent it to my pals, however security came over and told me not to take pictures or recordings at this store. I requested the security guy to demonstrate the concept of what is and is not permitted at this store. Security instructed me not to go anywhere because he would summon the manager, who would show me everything. I nodded and waited for the manager to arrive. Three managers arrived and immediately began looking for the written regulations of the supermarket, specifically the rule that it is prohibited to take photographs and recordings, but they were unable to discover such a rule. The manager then informed me that he is the owner of this store and that I am not permitted to take photographs or video in this establishment. Then I reminded him that if taking photographs and recording are not permitted in this supermarket, why not post it on the wall so that everyone knows? Then he said that it is his own supermarket and he knows what to write and what not to write. I said, "How can people know what is not permitted in this supermarket if you don't write the main rules oficially anywhere?". He stated that in such scenario, he will inform everyone orally. So, if a thousand individuals snap photographs in this supermarket every month because they, too, are unaware that photographing or filming is prohibited, would you notify a thousand people a thousand times in this store? He added that while he is letting me leave this time, if I take pictures or videos again the next time, he would punish me. After that, I exited the supermarket. But this is an odd restriction that is only spoken and nowhere written, and it makes me wonder why I am not allowed to snap pictures in public places like supermarkets, which are also public places.