It's not just deranking they'll be doing. It's cleansing your account of any purchase/progress/etc. you made prior to or before "glitching"
You're narrow minded if you think only noobs will be effected by this. I mean, a very handful of truly obvillious people, who had no prior experience playing this game used the glitch. Everyone else had major some progress /purchase prior to glitching. They had some level of a skill set that was within their rank tier.
BTW, op leaves it up to the people who suppoedly glitched to own up to their mistake. The people who don't will be getting a demtion, etc., but how will you know who didn't own up to their mistake?
What factor are you using to determine who did the crime, but didn't own up?