Two weeks ago I got matched with this guy on my team in CSGO, and then just so happened to get matched against him the very next game I played (the chances of this happening are extremely low).
At first he complained about my performance, but then the guy was convinced I was cheating. He was real salty, even made a comment on my profile. So here I am two weeks later, and I get invited to this group.
http://steamcommunity.com/groups/YourCaughtCheating>Place to post links, of players caught cheating - Name and Shaming Welcome1 member in the group, it's the same dude, he even made a post about me. It's been not one but two weeks later and this guy is still mad.