As much as i hate MULTIPLAYER cheaters and want them to suffer in a hot fire. They are players and a number in a statistic. If you remove the playerbase that is cheating. in this case, botting. The game suddenly look even more dead and developers will have even a less reason to keep working on the game. Cheaters getting shafted is a good thing. Game suddenly losing half its population is not good for the remaining players.
In the case of diablo 3 its not much of a problem, game is already dead and they are working on something new