I hope this is a troll forum. Please, please let this be a troll.
You should only be allowed to promote a pawn with a piece that has been captured

no seriously, I believe that would be good. Would save me some trouble, I believe. I am sure most GMs would not mind. Please can we have that change?

Maybe you could get an extra bonus for queening before you make a capture a non pawn piece by being able to vapourize your opponents queen
and promoting to it.
This might be a great idea since you more or less would lose if your opponent queens so early it could lead to new openings maybe .

It can lead to a forced stalemate, which wouldn't really be fair to the winning side.
That would a possible, but very rare situation.
It also doesn't take into account a situation where a pawn makes it to the 8th without a piece being taken.
I must have watched more than 1000 bizarre kiddie games, but nothing that bad has ever happened. Ok, maybe it has. But that is something I would not even consider to be a real game. In such a weird event, the pawn would have to stay where it is and promote once a piece is free.

What if no major or minor piece has been captured yet? Only pawns?
Exactly. Adds a new element of strategy to the game. You might even have a case of someone doing a suicide attack with a piece, netting a pawn, then promoting the piece back next move. Hopefully the pawn taken disrputs the pawn structure, because otherwise its an even trade!

What if no major or minor piece has been captured yet? Only pawns?
Exactly. Adds a new element of strategy to the game. You might even have a case of someone doing a suicide attack with a piece, netting a pawn, then promoting the piece back next move. Hopefully the pawn taken disrputs the pawn structure, because otherwise its an even trade!
you guys must have watched just as many kiddie games as I have.
People, you have to admit that in at least 99% of all games sane people play this rule change would not make any difference.

So you're proposing a major rules change because of annoyance with having to carry extra queens for scholastic players? Seriously?

Hmm, I guess these players would have produced exciting games of a slightly different sort.
It is less about carrying extra queens and more about me having to rush to meet the kids demand that I give them extra queens when they could checkmate with a single one.

What if no major or minor piece has been captured yet? Only pawns?
you missed it. But since I admire your chess speed so much, I will answer the question again: The damn pawn stays where he is until something is there to promote him into.
Now tell me how this scenario could possibly happen in a game where both players are older than 6.

This is not such a bad idea in practical chess. But the problems begin with compositions and ofcourse the one in a million shot where you get to promote at an important game..with all your pieces on.
Ofcourse it's also not a new idea. On the Commodore64 there were several programs where you could only promote to a previously captured piece because of how theirs limited piece lists worked internally. MicroChess and MyChess for example if I remember right.

What if no major or minor piece has been captured yet? Only pawns?
The damn pawn stays where he is until something is there to promote him into.
Now tell me how this scenario could possibly happen in a game where both players are older than 6.
Aha, ok. It will wait (on the 8th rank) to be captured.
OK, I want to produce yet another one of these pointless and brainless "we need to change the rules of chess" threads.
My proposal is that when promoting a pawn, you should only be allowed to pick from the pieces that you have lost so far.
For the experienced players, this rule would make little change in most games. By the time a pawn gets promoted, the queens have been exchanged anyway.
The reason for such a rule change is clear:
No reason to have additional queens or knights. One set will always be enough.
I would not need to have spare queens to give out to the clever kids, there would be less stalemates because the kids eager to get multiple queens are not clever enough to coordinate all the queens. Instead, they would hopefully learn how to properly checkmate.
On top of that, it may make the game a bit more fun in the rare case that you get a pawn across before you lose your queen as which of the pieces slain should be revived.