'Dry' concert

By what right were we not allowed to take in any food/snacks and drinks during the Ramazzotti concert? There was no mention on the ticket that food was not to be allowed.

Also, was it greed or what, that small bottles of water were being sold for 50c? Imagine the scenario where I had to lose my place, go through thousands of people to find a person at the end of the arena selling small water bottles from a plastic blue tank full of melting ice. Did they not consider that it was dangerous for people not having access to water and getting dehydrated in the heat.

If conditions (as stupid as they might be) need to be enforced, they should make sure they are conveyed well before and not at the door where tickets bearing these stupid conditions on the back were still being sold.