Doesn't shock me. The whole rep system is stupid and for the very reason you can game the system and screw people. Sure it didn't affect back then but I remember on the 360 I had never had any bad rep until the Halo 3 Beta. Got into that and all was fine till they opened it to those with Crackdown 3. Within 24 hours I got several false reports of Cheating, trash talking (wasn't using a headset), etc. People are just childish as hell and can't take being beaten. Hence they leave false feedback hoping to screw you over.
This is more then gaming anymore though. I find people in general are becoming just major assholes. We've gone from respectful, friendly people to fuck you it's all about me. You're scum if I hate you. Then you can just forget about someone being polite. Oh you're in that lane let me just pull over into you, ride your ass, etc. Oh hold the elevator. Fuck you. Oh you would like me to hold the door open for you? Yea fuck off. Oh you were waiting for that space? BWAHAHAHAHA. I don't care that I almost hit that little old lady tring to get into it ahead of you. Oh while I'm at it I'm going to let my kids run wild, throw shit everywhere, and just be an annoying pest. That's if I bother to take them out of my car though cause you know dealing with kids are so annoying.
I haven't even touched on Facebook and Twitter and online. There it's perfectly normal for people to threaten to rape & kill you and/or your family just because you either said something they didn't like, changed something they liked, or made something they didn't like.
Didn't mean to rant and go off topic. I really didn't. Just so sick of people being so vile and hateful anymore. I miss when we could all just get along. I feel for you OP.