Until Destiny gets an emote wheel I see it as the most accessible second language. Ever see too Titans across from one another behind their shield? It may look like they're just t-bagging the air, but really their having an entire conversation. Have you every had someone t-bag in front of you after putting up a raid banner. There saying thank you kind sir/miss for your generosity. Have ever had someone t bag you after you missed your fusion shot; their not saying thank you. The point is it's communication, and it brings us closer as a people. Also it your mental world, you can make these things mean, whatever you want them to mean.