I've mentioned before that in the past I ran a forum. The moderating bit was not fun, especially as I was doing it in my own free time. The number of times I was accused of being "on a power trip" and even of being a Nazi... Are the mods here actually BioWare employees?
Idiots.
I remember once, on Black Mesa Source forums, I went on about scalpel-precise violence and what not, in a topic that was something akin to a "hey violence on defenceless scientists in Half-Life is among the funniest bits, why can't we do it in BMS?"... Well, I said something about how that was simply WRONG.
Guess what a mod did. They forcibly swapped my avatar for a screenshot from the game of a scientist being shot, in attempt to discredit whatever I say.
Never visited that forum again...
Anyway. What you say would explain why they're faceless, and their accounts have zero personalization. They appear barely more than simple bots that way.
It also strenghtens the theory of them having alternate, regular user accounts...
Also, let's not forget that there are probably corresponding Origin accounts, which could be used for later phases of the testing (simply, the game even before release, is in a beta state on these accounts, blah blah blah, stupid theory of mine) - and as we know from the pre-release MP stream, they used names like "BioWare001" or so.