Maybe this thread could spawn a new one about the general rudeness, or lack of etiquette, amongst our fellow Americans. There may already be one somewhere around here but I can't say for sure.
Case in point:
Friday night my 8y/o daughter had a slumber party with six girls from her school.
They ate supper at my house, played into the night, and ate breakfast at my house.
During both mealtimes, the only kids I heard saying 'please' and 'thank you' were my own.
The other kids were extremely rude (had I acted like they were my mom would have um.... corrected me

)
No etiquette whatsoever. "I hate pizza said one." "What, you don't have blue milk?, I hate red milk and I hate that cereal". Egregious ettiquette violations when a guest, or so I was taught.
Being that they're little kids, I can lay the blame squarely at the feet of their parents.
I am no Mr. Manners myself, but I do strive to teach my kids basic social etiquette like please, thank you, yes sir, yes mam.. Calling adults, if they use their name, Ms Rhonda, Mr. Dave etc. None of the guests did that.
They continually interrupted my wife and I when we were talking, and addressed us as if we were their equals.
I will add that most of those kids' parents are in their 20s and 30's, ie younger than Mrs Roy and myself.
One of those parents is the lady referred to in my first post on this thread. Is there a connection? I think there is.