Sure [u][b][i]ONE[/i][/b][/u] member of your Fireteam (you) not having a Mic might not be hugely detrimental... but could you imagine if everybody approached this with the same attitude? Would you want to be in a Fireteam where [i]nobody[/i] had mics because "they didn't need it?" where every message was communicated through texts? It's more of a courtesy thing in my mind. I use my Mic even though I'd rather not, and personally see no need for it (since I know what I'm doing) because I understand that I would much rather use a mic than encourage others not to use theirs. So you have a special case where you know what you're doing AND you just happen to not have access to your mic, but I wouldn't so readily promote not using mics because I assure you, they very much are needed for group cohesion--particularly in PuGs and when certain raid members aren't incredibly experienced with the content.