Yes, people are advised not to feed gulls…

Nesting gulls can also be a problem. I remember one at Llandudno Hospital when herring gulls were nesting on the roof of the geriatic wards/day hospital unit where mum worked. The gulls would swoop down on elderly people as they entered/left the building. I think the hospital started having the nests/eggs destroyed to stop this.

All that said, I did meet a friendly herring gull who I did give a bit of food to one Conwy Festival week. (S)he was a funny creature who just stood beside me if I had food. The bird would refuse a chip if offered one but was satisfied when given a bit of my burger.