I expect an airline to get me to my destination safely, along with any checked luggage.
I do not expect any serious considerarion from other passengers, though obviously I expect we will all be polite and reasonable. I don't expect to be particularly comfortable in economy.
Recline if you like. I will wake you myself and ask you to put your seat up for meal service. I will recline my seat the moment the person in front of me does and I will put it upright for meal service if they do.
People getting in a twist about this baffles me. There are obviously good reasons to recline your seat. Go ahead and do that if you want. From the moment the seatbelt sign is off if you like. It's not rude. It's a function of the seat you purchased.
If you cannot handle a reclined seat, you should not be seated where that might happen.