RELAX, EAT and SHOP.
Suppose I'd rather get very tense, abstain from food and save money? Its my choice.
Perhaps if you are seen not to be doing at least one of these things they will call security, and make you wait outside in the rain. I did drink a paper cup of hot chocolate - which incidentally was made by Eddy Grant - didn't know he lived in Bournemouth. Then I looked at sunglasses until a shop assistant came and told me I looked nice in a pair which made me look like a deranged fly. I didn't relax as I had to keep looking at the board in case it said, 'put that f-ing sandwich down, and run very fast to gate seven.'