Guy overstepped the line when he tried to throttle the kid. Scaring him would have sent the message+been funnier "wanna say all what you said before to my face lad?".
Kid I felt got his just desserts when he was scared i guess, but the overall view of his actions after was far too generous:
-Should not have been playing the game in the first place.
Ah but frank didn't you and countless others play m rated games before you were old enough?
Yes bob, but the difference is we didn't advertise it and draw attention to ourselves, much less pick on mentally vulnerable old men and made them angry (and the kid must have had an inkling guy he's picking on was vulnerable in some way, just like trolls do when they smell a target)
-Tormeting someone on the net might seem lulzy cos you don't see the consequences and you get a thrill from making someone rage helplessly at you, the feeling of getting under someones skin and rendering them into impotent raging beings might delight quite a few net denizens, but in the rl that leads to consequences as hatred needs to be dissipated or converted, it doesn't just go away when the taunts stop and the guy is still raging.
I do not know if it's the online components of games that fuels this or something to do with how kids are raised or some other exterior influence on them, but this sort of online behaviour is just not on. You should be able to play a game without some stranger making it their mission to make you rage, it's sad that we accepted this facet of online gameplay so easily then get surprised when incidents such as this happen.
Even online, there should be a measure of responsibility to your actions.