Don't take it personally. You think your neighbor wants to record you and your dog specifically? I mean, it's possible, but it's likely they just want to be able to see who comes to their door, or have a general idea of what's going on around their house. I have my locally hosted reolink doorbell set to trigger on zones if things enter my driveway or approach my door, because that's what I care about. I get a bunch of crap with kids playing in the street running onto my property, people's dogs straying off the sidewalk, and the occasional vehicle turning around. But I also figured out what kids were doing dong dashing, and have record of what deliveries were suplexed WWE style onto my doormat so I can more easily handle stuff damaged in shipping.

If you hear some crazy shit outside you probably get up and look out the window, don't you? Well, a camera means you can go back and see what happened all the time. It's a no brainer why people want them now that they're cheap and accessible.

Most people don't have any idea how bad cloud cameras are for overall society, and they'll probably roll their eyes and think you're crazy if you try to dive into that conversation with them out the gate.

They're legally within their rights to do what they're doing, so you can dislike it all you want but there's not much you can do about it without some pretty diplomatic conversations. And a passive aggressive note left about them watching you and your dog isn't going to help your case, at ALL. First you'll have to become friends with them so they trust you, then find a way to educate them and change their minds.