The flatline does enable someone to shoot a bit longer distance then with the stock barrel but I find the paint would just bounce off me and not break. I've even seen some with flatlines shoot at a wood bunker wall and it would still bounce.
Now some people (noobs, younger players) would be afraid of someone shooting at that distance. I just stand there like a fool and take my chances it would not break (I personally find it 70/30 percent it would NOT break).
Of course, it could of been the paint. I doubt it since it was several people with flatlines using various paint.
Getting a new hopper would be a good choice though. I've already replaced mine twice already.