I think that you should get a punishment like losing points when you leave games, its very annoying in Tower Defence and Blockwars.. If players would so a message like "Warning you will lose points when you leave the game" then i think that they wouldn't leave to be honest. Because now players keep leaving if you're losing while you can still win so i really think that this could be a thing. Let me know what you guys think :)
When your internet / wifi crashes and you can't reconnect to the game because of that, you'll lose points?
No, that would be unfair to the players that got crashed.
People often leave, because they are losing or have to go, you can't punish them for that.
You'll just have to play with less players for the game, and if you lose, you can always start over.