Well, I had a few weird cases of lasering someone like I had an aimbot.
Once, I ran towards an enemy that was shooting at me, sliding towards his left side (20-30 degrees angle) while shooting at him with an R-301. He soaked the full magazine, the damage number went up to 190, but the crosshair felt like snapping and locking on the target. It was early game, the weapon didn't have high tier stuff on it and I certainly have average aim skill.
More recently, I hunted someone running far from me with a g7 and kept hitting every shot although the weapon was low tier kitted and the enemy was not moving straight. That player and his team were all watching me after we wiped that squad, to see if I'm hacking.
I imagine people with more skills have "laser targetting" moments like mine more often. add a few lag issues to those and they will certainly feel like cheaters. I wouldn't be surprised to find out I have a few reports because of cheating and I'm sure there are tons of "false positives".