Based on looks, camber is needed to fit crazy offset wheels; If you want to wear out tires, and you are ok with that oh well. It's your money and your car. From a handling perspective camber helps to keep tire contact patch during cornering. look at pic below. How do you think that Supra would do with .8 to 1 degree negative on that turn?
Some of us don't drive in strait lines only. Im not all about drag racing my Supra (boring) Some group A Supras would run - 6 degrees of camber to help with optimal tire contact patch under hard corners.
I find it, that running negative 2.5 to 3 degrees gives me the best handling for the street on street tires. It doesn't yield the best tire wear but it makes me happy wile I out corner and out handle all wheel drive cars ( EVO MR, EVO 8,9,10 and STI's) If I see the inside wearing a little bit uneven I just flip tires from left to right from wheel to wheel.
If I drive hard enough I can get a tire with - 3 degrees of camber, 0 toe and max caster, wear even all the way flat, sometimes i can get the outside to wear more. :naughty: