My reason for starting to leave games
When someone on your team, decides to leave games, or dc, people say it's not worth wasting others times to dc/leave games. If it isn't then why am I still playing the game when I have team-mates that leave my game. This game has been out for far too long to not be able to deal with the %50 of people that occasionally leave games and think it's okay because it's just one game. Starting now, I'm just going to see games as not worth my time when someone on my team leaves/dc for more than ten minutes straight. If they are having internet provider issues and are actually making an effort to rejoin the game and play, then I understand their problem and will keep playing, otherwise I'm just leaving. Really, it's not worth my time, nor is it worth anyone else's time on my team.
For people that take this the wrong way. Or just think it's a bad idea completely, I've had way to much dc/leave within my game and it's starting to get annoying. I try to keep it cool, which I have for a very long time and still can. But it's still getting on my nerves.