It appears that we will have multiple options for turning off Vulnerability Icons: Screenshot from Spytle's Twitter page: https://pbs.twimg.com/media/BRFneTACAAACS06.jpg
...../ ) .....' / ---' (_____ ......... ((__) ..... _ ((___) ....... -'((__) --.___((_) that other thumb up is just too small for this info....
These options, when released, will only effect your client. Meaning that choosing to not display them will not effect whether someone will see them on you only whether you will see them on yourself and other players and NPCs. DeadMeat