GTA is not all about killing people. Freeroam is a place where there should be rarely any deathmatch at all, so I could see the bad sport coming.
To me all the fun in GTA IV online was me & a friend driving around shooting the sh*t out of people & running them over. I really don't see what else you can do in free roam, sure there's the minigames now but I just want to go out their & have more fun killing people.
Now they are making it sound as though you can't do even that without being punished.
So, with the report system in place, you will get matched with like minded players, that "drive around shooting the sh*t out of people & running them over". You get what you wish for - like minded players that will shoot back, because that is their idea of fun.
This should be a good thing for you, unless you an asshole that likes to grief less trigger happy players, in which case, well... you have a choice: keep being an asshole and be matched with assholes, or be a smaller asshole and don`t grief people.
Say I am robbing a bank and you attack me, that`s OK - you are after my money. We fight, one side wins, money end up in the bank. Say you win and I go to rob the bank again and you attack me on my way to the bank, just because. I might fight you or not.
But a third attack and/or stalking me and my crew is harassment (in my own eyes, anyway), so I will report you, if I can. I don`t care about your definition of fun or your gameplay - you WILL get bad behavior votes, which will likely lower your chances of getting matched with me and it will put you in games that you like more - shoot people that shoot back. I assume nobody likes shooting targets that just run and never shoot back - that`s only what assholes do.
So, I guess the relevant question is: Are you an asshole or not?
Because, for an honest player, this system is OK. In time it will match like minded players, which is a good thing