I just played a game where our Jakiro disconnected at level 1 but we kept playing for a while. But once the abandon kicked in 2 more people left the game. I'm left with our mid who was doing okay and decided to just keep playing.

http://dotabuff.com/matches/305459670

As you can see we did surprisingly well, mostly because we had a ridiculous amount of gold/second and all the lanes were pushed right up to our rax. Elder titan microed the leavers and we got some kills in the base and just defended for ages. The thing was the other team just flamed and raged all game, calling us 'cheats' for not leaving, reporting us etc. which definitely annoyed me a lot.

Point is, was this a little dick? Or were they just mad they couldn't win 5v2? No denying I enjoyed going beyond godlike

Nope, not at all. Australians aren't allowed to be dicks.

This is great. Why leave if you are still having fun? If the other team wasn't enjoying playing 5v2 they could just as easily have left.