When it comes to punishments, I'm a big fan of giving a solid warning. After you give a warning you are given every right to go crazy on the person. Without a warning you can easily be turned into the bad guy. With a warning, you can always fall back on "I warned you." Without the warning, there is no meaning in the punishment. Make sure that you backup your warnings though. Nothing will destroy your credibility like failing to backup your warning.
This is one way to get your kids to stop throwing clothes on the floor. The only problem is that if this parent throws enough clothes on the floor, they'll end up having to buy the kid a whole new wardrobe. I'm sure there plan is to leave only the worst clothes, like the school uniform... from ten years ago.