Is this rude?

I hope your initiative become a trend and helps to bring back some real human relations. me and a few hundred friends meet every year to camp out in the wilderness far away from civilisation where there is no cell signals, electricity (or cops).

I think that’s completely reasonable though I doubt anyone will listen

I realize today it’s hard to visualize, but there WAS a Time Before Cell Phones (I hear Disney’s going to make a series of movies starting with that one...followed by How Cave Men Heard Music....as well as a handful of Short Subjects including ‘This Is a Dinner Table’
and ‘This Is a Letter on Paper.’)-

I have ideas for some games. How about dividing the guests into twos and provide one with a slip of paper with the name of an object or place. The one with the paper has two minutes to describe the object to his/her partner. You could call it... ‘Talking.’

Or what about an updated version of the sack race? Duct tape the participants’ thumbs firmly to their hands then hand them a cell phone and give them urgent information to convey by text.

....or Bobbing for Emojis...hands tied behind their backs, the person who’s ‘IT’ must locate a randomly selected emoji from the cell phone’s cache using only their nose or chin. You could call that game ‘A Mile in Your Parents’ Moccasins.’

It's not rude, but you are limiting the memories that they can have, unless you have someone designated to take photos and then send them to people. If you have a text/email distribution list, so they can save the memories of the party and night, with photos, then I would not have a single issue with the request. However, fewer people carry cameras (I do -- everything from a pocket point and shoot to a DSLR with multiple lenses, and even have medium format too, not to mention film cameras for lomography), so without pictures, it would limit the party a little.

It is your home. Your house your rules. If she wants to have own rules for it, let her host it at her own place or a place she rents or pays for.

I’m torn between agreeing with you and feeling it’s her graduation dinner and she should be able to do whatever she deems fun with her friends.

But no one can leave their phone at home. Just ask politely to keep phones to a limit.

Therefore, you should have games and activities for them to do.

Well, it's your house. Your call. It really shouldn't be such an issue, but they're gonna want to share pictures and such of the party. It's almost a must.

What if they were all texting their parents telling how much fun they were having and what an amazing host you were...?
🤔

Why not. I think its not much to ask, especially if you're hosting and going out of your way to make it a thing.

No, it might make it a night they'll actually experience rather than one they'll spend behind their phones.

I'm not like to part with my phone so much 😑6

Sounds like a good policy to me!

Brill idea

That’s a great theme for a party- personal interaction

Turn off your Wi-Fi 😄

Sounds like fun