I agree, anyone who hasnt done some donuts and abused a set of tires or a toy car doesnt know what they are missing. Whats the point? as the OP said, purely for the fun of it. You say its just a waste of money, so are almost all hobbies. Going to an amusment park can cost a family thousands and you have nothing to show for it when you leave...except maybe a smile on your face. People jump out of perfectly good airplanes for fun, its not a cheap pastime but guess what? its f'n fun.
Would I do it in my DD? no way. Would I do it to a second or third car I had just for the sole purpose of beating on? DUH!
Im sorry but I have to agree, if you dont get the point, sell your Supra now. :nono: