Pesky effing wildlife crapping on the railing...seriously LOL! I won't mention in detail your formidable environmental footprints on the AC and sea ecosystem Elbert and Harriet.
Killing the local wildlife for behaving as it was created to behave is misguided to say the least. We have grackles and tons of other avian species cohabitating as creation intended, as I know you also do on AC. Move to a grackle-free locale if you don't like them, don't claim they "murder", and then go out and selectively shoot members of a particular species because you disdain its natural characteristics is ridiculous, ayayay!