You can't bring a shovel onto a soccer field. You can't drop kick a basketball during a game. Why shouldn't Blizzard prohibit tools and activities that are no

You can't bring a shovel onto a soccer field. You can't drop kick a basketball during a game. Why shouldn't Blizzard prohibit tools and activities that are not deemed fair? My only problem with the Warden is that they did it without telling users it's there and what it's doing.