I thought it was odd because one day he had 40,000 points and then not even 2 days later all of a sudden he had over 100,000. I knew he modded it because there's no way he could get that much in 2 days. Then after about a week I get a message from him saying Microsoft is "a bunch of greedy dicks" or something along the lines of that and his gamerscore was a big fat 0. He says his reasoning behind modding it is because it doesn't affect anyone else. And he's right; it doesn't. But its's still cheating.
I'm surprised people even bother modding their GS anymore because they know they're gonna get caught. They know they're gonna get reset and/or banned. Why do they do it? Anyone whos smart is gonna look at their achievements and see that he got ones that require an internet connection offline(modded achievements don't have time stamps).