Shoulda typed more about it :sorry: ..... fix up some temporary shelves or borrow an old unimportant bookcase, stand the plates up on it and have a good
long distance to throw from - you'll also need to remember about the sides.
Or...you could paint paper plates, get in with your greengrocer/supermarket/market holder and see if they'll let you have the soft tomatoes - I know I'd relish (haha, relish:rotfl:) the chance to throw rotten tomatoes!