I lived with seagulls in my backyard for over ten years. I’m perfectly fine with a gullocide.

But more to the point: it also depends on the exact species. Here in Germany there are relatively small seagulls that don’t make much noise and are relatively benign. And then there are these air chonkers that have a wingspan of almost two meters and scream around for no reason at all. Also, they love to completely disintegrate every trash bag or open dumpster.