I read the first page & this one, and just to jump in, I see a lot of people asking for the stats to be reset, while having the possibility of P'ing a lot of people off..... annnnd doing nothing would P everybody else off.
Simplest Solution:
Just add (either in the game menu or Steam) a button for individual players to determine for themselves if they want their stats reset.... at any given time.
You will have people who will want to earn things on their own, others who actually had the stats work properly get to keep their stats, people who don't care one way or another get to choose whatever, and the odd player who thinks they have any real advantage get to keep their stats.
This would also please those who would complain they were being ripped off some how if they lost their stats.
Beyond that, the problem is solved.
Anybody who continues to argue about others & what they do with their stats... need to focus more on their own game. Unless someone is hacking, tk'ing, pirating or being a troll, what they do with their own copy of the game is their own bussiness & Tripwire's/Steam's.
Besides, I imagine there will be some who don't want stats & disable or reset the stats all the time.