Its one of the few places you punish and disgust your fellow co-workers without fear of reprisal, plus the added bonus of anonymity.
Unless of course you get caught doing the walk of shame.
Nah, too much traffic and it's usually horrible smelling when I walk in from the mongos super meat-dumps, the reverse butt chugging is terrible.
On the rare occasions when the room is empty I take a soapy paper towel, wash off the seat, and start to empty my bag. Never fails, some finger sniffer takes the one stall, out of 5, next to me (I always take the handicapped stall with a wall on one side, helps my odds).
So I hold it whenever humanly possible. Sometimes the gopher comes out of the whole a little bit but I only live 10 minutes from work. Then I can go full Castanza.