I have a couple of reclining stories, both in economy and on flights to Europe:
1) I recline. Guy in back taps my shoulder and asks me not to because he is on his device. Now, I dont agree with this reasoning but for some reason was in a good mood and said OK. Fast forward about an hour later I walk back past him and he's got his own seat reclined despite the fact that the guy behind him was on a device. When I got back to my seat I shot it back on full recline and and waited for him to say something. It didnt come immediately, but fairly soon he asked me again to not recline. I politely said I didnt think i would this time, and told him exactly why.
2) On a flight from England to the USA, I reclined my seat and this fat English guy with a snotty little kid sitting next to him didnt ask, but TOLD me very rudely, ,not to recline. I asked why. He was not on any device and there seemed to be no reason. He wasnt very tall, just a bit overweight. So I politely said that I was going to try to sleep and and needed to recline to do so, and that he might consider reclining his own seat. We were both in the middle of rows and rows of reclinable seats. He got upset and got a stewardess. She sided with me. He didnt like that and started kicking my seat repeatedly like a spoiled child. I stood up , walked back next to him in the aisle, leaned down, and told him that if he didnt stop the kicking, we would sort this out at the gate after we deplaned. It stopped and he wouldn't even make eye contact with me after that.