Maybe they are afraid that potential or actual employers will see, and for their livelihoods, they need to be politically below the radar?
I don’t know if that is true, but I definitely hold my tongue (fingers) back on places like Facebook. In here I can be me, out of the closet, unabashedly conservative. I’d like to think that without ID that I am anonymous enoug here for cursory perusal of me, online inc.
That's so me.