The only place you are safe from the depredations of seagulls is Brazil. I have never seen a single one anywhere in the country, which is odd as I thought the damn things were damn near universal. I'm pretty certain I remember seeing them in Chile, I know they exist in Argentina and I've seen them in Europe, North America, Australia etc. Bizarre but I've never seen a single bloody squawking chip robber in Brazil. Another reason Brazil is the finest of all places on earth.
My theory? My mother in law's family probably ate them all.