Lol. So true. I had a co-worker that I talked with several times a week about technical issues via HipChat for almost a year before I met him in person and the entire time I knew nothing about him other than he was a guy or identified as a guy and he was really good at his job (we have a few trans co-workers, so I don't assume cis-male). When I finally met him, it turns out that he was on the same floor about 50 meters away despite the fact that we're at a company with 1500 engineers spread across multiple offices.