I get your analogy. What I’m telling you is from a networking standpoint, they can not tell HOW specifically you were disconnected. You could turn off your console, unplug your router, suffer a packet drop or even get DDOSED but the end result is the same D/C error for all intents and purposes. If they could do it, they would have done it. They can’t, which is why you still get the same warning and penalties regardless of how you left the game if you left before it match ended. And more to the point, this is exactly why they are issuing 2 week crucible bans to players with crappy internet or potentially cheating.