I never did anything to harm animals. But I would tease the hell out of them. Here is an example:
I use to take my fishing pole to the shore without hooks, just fishing line. At the end of the line, I would tie on a piece of squid. Then I would cast the line on to the fishing pier. Seagulls would swoop down to pick up the squid. When they fly off with the squid, I would let the fishing line go out for a bit. Once the seagull would get some distance, I would pull back on the fishing pole and jerk the squid out of their mouth. It would make the seagull spin in the air. I always thought this was a good way to get back at the seagull after they dropped a load from the sky which hit me once or twice in my lifetime.