Wow, back down son, we're not boosting for stats or unlocks, we're getting knife 5 friends in a game which when you join a friend you join on their team and thus can't struggle to get 1, it's taken me 50+ hours to get my chance at my first 1. It's one of those achievements which relies on very specific things happen which are out of your control and then you're in the right place at the right time. Not to mention you need 8 people for a private match to force yourself against friends to do it that way without deliberately arranging it.
With a skill level hovering around maximum, a win and kill death ratio above 2 and every unlock in the game already, I think I know how to play the game properly and I think I have some skill.
Online trophies which rely on other people doing something specific and certain situations you can't control, which often requires them to be quite bad players for a kick off, always have been and always will be completely bull. Similarly, Trophies and achievements don't really mean anything and we're not gaining and advantage or in any way effecting the gaming experience for anyone else.
I'm not a fan of boosting, but if it's for something which won't effect someone elses gaming experience or give someone an advantage I'm not going to stop someone. If it then goes further and is very specific relying on specific situations which are out of your control then I'm prepared to do it if it's holding me back from a platinum as I don't think having someone else give you a chance to do something is an achievment. Does it take skill to knife someone? No, most of us probably have 50+ dogtags. Does it take skill to knife a friend? No, it just requires them being on the other team which happens by pure luck in the first place and you doing what you'd normally do to knife someone, which requires them to be stationary and leaving a way to get behind them.