If people don't want to use their manners with me when requesting something, that's fine. I just won't give them what they're asking for.
Just as they can choose to say, "can you get me some water?" Without a please, I can choose to not get them a damn thing until they ask me in a more polite way.
I honestly don't really care if anyone thinks that's horrible. It's how it works with me. They will either learn to use their manners around me or they will not get what they're after. Simple.
Eta: I guess you also have to look at this from coming from a woman who was brought up by a downtrodden doormat of a mother. She had orders barked at her and had to comply.
I am determined to not let myself be treated similarly. If anyone, adult or child, starts treating me like a slave then they won't get a good response.
I also don't go around telling random kids what to do. Lol. I meant more nieces, nephews, etc. When they are, "can you get me a drink?" I pause and wait until they add please. I don't let go of the cup until they say thank you either. These are children I know. I would behave similarly with any children in my care... But it's not like ill interrupt your family in the shops and tell them how to behave. Lol.