You can talk all you like about what’s allowed and what’s in the laws, but I will continue to think that it stinks. It’s exploiting social convention to gain advantage, like a scammer. The net result is harm to the game, because everybody has to start being more paranoid and thus taking extra time to pointlessly belabour what should be obvious. The fact is that Bairstow wasn’t seeking to gain any advantage in the game. In fact, at that point, he wasn’t even playing the game. The Australian team’s actions (and it was them as a team) were those of a petulant and irritating clever-dick child, not those of a sports professional adult.