Players who don't show their cards on the river

[DavidC]

I have a pet peeve.

I HATE it when people bet the river, and then slow down the game by saying stuff like, "Can you beat a queen?" Etc.

1) I don't like them slowing down the game.
2) When they bet and they're called I think I have "the right" to see it.

How do I discourage my opponents from doing this without alienating myself?