How do you handle Wish?

[sithlordnergal]

I don't ban Wish because it has built in guards against abuse.
I would allow anything that fits the written description of the spell, so long as the "wish" is in game.
Real life wishes do not get granted. No game mechanics can be altered. The re-roll option is a recognized "in game" phenomenon.
I would not allow extra attack, added levels, extra spell slots or free snacks.

Aren't spell slots and extra attacks an in-game phenomenon, recognized in game and referenced as an in game phenomenon?