What's the point of the XP, if you don't EARN it though? Are people so desperate to get to level 40, which by the way means nothing (except, you get to buy the X2010). I know people can say "I have reached level 40", but do people not like themselves enough to think they have cheated themselves out of fun to get there. There are so many possibilities with the recent seasonals to have a lot of fun in cars that you might not think are fun to drive. I found a little jewel in the Spoon CRZ during the compact seasonals. Yes, you have to slightly detune it, so that you don't run away with the competition, but it handles great, and a joy to drive.
I'm sorry, I just don't see the point to glitch in a racing game of this size. There is so much more that GT5 has to offer, other than reaching level 40 as soon as possible. Is GT5 perfect, not at all, and far from it, but it is the best console game as far as physics and content.