I work on a boat offering sea trips to tourists, we operate from a quay roughly 100 yards from where fishing boats land their catch, the space between being at least partly occupied by fish+chip emporia.

The gulls here are mostly herring gulls, large, well-fed and numerous. On a strafing run a single bird can give a generous splattering to 60 ft by 10 ft of deck, and a fair bit of vertical paintwork as well. I haven't yet spotted them targeting individual people for decoration (for attack and mugging for food is a different matter) I'll keep an eye open, cautiously. Most of us will be hit about twice a year, though the "barker" on the quay gets the worst of it.

One of our "barkers" suffered the ultimate indignity about a year ago; he opened his mouth to call out his wares, and a gull passing about ten feet above managed to drop one right in his mouth. To his credit he didn't vomit though he did spit profusely. I doubt that I would have retained my breakfast, had it been me.