I do that with both snipers and tjorb. Chokepoints are so nice when ur team holds them.He's far, far too powerful for his role. I've watched him in his killcam's and Play of the Games basically just swirving from target to target getting kills in barely two seconds while being far apart from each other.
He's basically the Techies of Overwatch. Yes, he can be countered easily. Yes, you just dedicated a good deal of your effort to countering one person and thus allowing the rest of his team free reign to do what they came to do while you're distracted or dead.
I just got out of a game where I was on defense so I just picked Bastion because I felt like "cheating." Eight player kill streak for standing in one spot where I was easily spotted. They continuously kept trying to sneak through the same paths to kill me so I press Mouse1 at them until they stopped. Finally killed by a mercy ultimate after being zerged and the bodies got back up.