Ok, lets put this into comparable terms.
To start off with, this guy is screwed up. Hacking these games really screws with alot of people.
For everyone who says "Its just a game" and "People are just stupid to value it", let me put this in common terms for you.
Its entertainment. If you go to a night football game and someone shuts off the electricity and you paid to get in there, you'd get pretty pissed off. Hell, you might want your money back depending on the seats you got. You probably especially would want your night back if you made a long drive.
If you go to watch a movie in the theater, and the sound cuts out, the video halts, etc.. you'd be pretty upset as well. Once again, you'd probably be asking for your money back.
Now these games, you so despise, are the exact same things. This is someone's entertainment, you can compare it to live sports or a rented movie, the movie theater, or a poker game, it doesn't really matter. Hackers generally screw these people over. Things disappear that shoudn't, if your playing competetively, then its like someone can see your cards in a poker game.
And you can say that nothing in the game has real monetary value, but generally it does. We rate time as money. It is the reason we pay people to do things like mow the yard, because everyone's time is limitted. You only get so much time to watch movies or go to parties or actually sit and have a beer. If it took you time to do something and someone screws it up and you paid for that timme, then you lost money.
Game companies aren't really the ones who get screwed over in this. The hundreds of thousands of people who get affected by it get screwed over.
And not everyone who plays these games are crazy. Some people just find it more interesting to spend 15 dollars on a game they can play any time than to spend 15 dollars on movies that can get old quick if you try and watch them a second or third go round.