So they can negligent and let them roam free? Which is illegal in most jurisdictions regardless? Insects don’t care about a bell for one thing, and we already established that it’s not just birds, but insects and vermin the decimate populations of too….
For another, you are clearly entirely ignorant on a whole about all the issues they present if you’re still bloviating about birds.
So, one thing people like you who just decry people trying to educate others about the issues, is they also carry deadly diseases and crap everywhere. If they shit in a garden (which they do it’s giant litter box) they can contaminate that persons food.
So now that you are educated on the fact that there’s more than just “birds” that are the issue here, your gonna shut the fuck up or at the very least stop insulting people who are more educated than yourself…? Right…?