You can't be serious and start whining about how there's the possibility of people harassing you over a parser or whatever scenarios y'all like to imagine in your heads when it rarely if ever happens in game. You know what does happen in game? People who don't know how to press their 1-2-3 combo or quadruple weave their gcds. There's no way that open communication about trying to kill the boss and making sure everyone is up to par is worse than the player who still doesn't know their rotation at level 90 and doesn't even have the right food buff on. And often you don't even need to bring third party programs into the conversation. When I look at the aggro list and see the dragoon below the summoner, it doesn't take a rocket scientist to figure out that someone doesn't know how to play their class.