I blow through 4 way stops all the time when I see no pedestrians or cars present. I trust my ability to assess the safety of the situation and in 13 years of commuting 5 days a week have never crashed or had an incident with another vehicle or pedestrian. Honestly, the only close calls I've had are with other cyclists doing the same thing as me.
I don't advocate my riding style as being safe or correct. Just answering honestly.