I've lived in the same building in NYC for almost ten years. For most of that, we had a great and conscientious upstairs neighbors. A young, straight couple moved in last year. I swear they were concrete shoes - especially the guy - and they look like hipster weaklings who got lost on the way to Brooklyn and somehow ended up in the UWS.
We have politely asked them to install rugs, not wear shoes, be more conscious of living in a building. They doubled down by getting a giant fucking dog that barks all day and night. The landlord does nothing, even though the lease says no pets. I actually love pets but I don't want to live below a dog that is not house trained.
We are well liked in the building so I've already started a whisper campaign about them, and now most of the building hates them. We are leaving for various reasons - including them - in March. Rents have plummeted and there are better options for even less money than what our lease locked us into (and our landlord would not negotiate down, so fuck him).
I can be a grudge holding bitch. My BF is like let it go (though funny enough, he got into a screaming match with them over the noise).
Aside from the whisper campaign, I was thinking of the following, which are surprisingly easy to do (n the poll).