Just something I think would be a good idea

So you go to your blue buff and you start fighting it. It gets to low health and then your Blitzcrank pulls it over the wall and takes it. Maybe you ask for a hard leash and then Teemo or twitch just takes by mistake. While being careful and just smiting can help avoid this, I think adding some kind of protection would be nice. I just want to be clear this is for teammates stealing your camp.

So here is what I came up with. DOTs won't finish off a jungle monster for the first 2 mins unless you have smite or your jungler has not attacked the camp within 5 seconds. Have something that checks if the camp was stolen. If the camp was stolen maybe the jungle gets full credit or at least half credit. If the jungler was attacking the camp for the full clear and the last hit was gotten by someone else then I think it would be clear that it was taken. What about 2 or more smites? For one smite it is pretty clear that the one person with smite is likely to be the jungle. With 2 smites you would have to use the role in draft or everyone with smite in blind pick. Now sure you can trade lanes but the one who gave you jungle probably won't take it for a simple reason. The simple reason is if they traded they have no reason to steal your camp. If the person you were trading with does then they were going to troll anyway. Sure that reasoning is not flawless but I think it clears things up.