My hate comes from experience. The bike I once used for commuting had them, and way too many times I found myself waiting at a stop sign for a gap in busy traffic; The gap would appear; I would stomp on the pedals; And find myself stuck in the middle of the intersection, because the drive side of the axle had slipped forward, wedging the tire against the frame. And this was an *internal* cam skewer tightened to the max.