I think it's stupid for most to wear masks though.
I think you'd only want to do it if you are strongly matching the music with the look and visuals,
or if you are getting on a bit and aren't marketable to younger generations,
or extremely introverted/shy and can only play live with it
generally though it's crap. (i,e, mstrkrft's hockey masks, funt cases potato sack etc)