What the hell is that kind of hack?

I dont think it's a hack because if it was, that means the sin did it.
If he was a hacker, he wouldnt have cared if other people hacked.

Not necessarily. I see people in Ariant PQ all the time, using no-delay and then calling other people hackers when they get bombed and stuff. Hackers will say whatever dumb pomegranate they can think of.