Hacked Halo 3 Profiles?

Just a question about EXP and Skill in Halo 3 and on people’s profiles. If their Waypoint service record says Highest Skill 50, 450 multiplayer games played, and over 100,000 EXP, is that a profile that either hacked or boosted? If so, do they still face consequences on Live/Waypoint?Halo 3?

Edit: Also only 4000 total kills.

Those numbers don’t add up so it’s possible the profile is modded. If someone has played 450 games, the most XP they could have is 900 I believe. I also find it odd that someone who’s a 50 averaged 8.9 kills per game.