I can see where you are coming from, but if you stand there with a t shirt on then i would think you would sweat even more, then start to smell. And there is nothing worse than standing next to someones sweat smell.
And agreed when in food places or when in a queue for food you should have to cover up thats just curtious.
And to be honest i dont just go on holiday for the parks and so on, i would like to come back with a tan, but if we are made to wear tops then i will still be whitei n places.