I call it a "Left-T-Cross" because they cross your path and you either T-bone them or they T-bone you. Other then quibbling about the name to call the hazard, yes, I agree it is a major hazard. In high speed traffic where I cannot keep up with the speed of traffic or get close enough to fully take the lane and ride "All In" and rather I am riding "Out" of the main flow of traffic to the right of the white fog line, or on roads that do not have a safe, effective, and satisfactory place to ride in the "Out" position to the right of the fog line when I am riding "In" the main traffic lane but am too the right in it riding basically in the right tire track of the lane this is one of the most significant hazards to be watched out for. Right hooks are probably actually less of a danger in some ways since this kind of collision tends to be usually a more violent "head on" or T-bone collision which is not as easily escaped by "bailing" into the ditch off to the right if necessary.

Even riding "All In" in low speed in town traffic where I can keep up and basically taking the same position as I would riding a motorcycle it is still a hazard with some scum on the road who absolutely refuse to yield while making a left hand turn because I'm a cyclist where they would yield to a heavy vehicle. More then once I've been tempted to bash in a left side passenger window with a U-lock after skidding to a stop inches from T-boning some cager who made a point blank range left hand turn right in front of my path illegally violating my right of way and failing to yield to straight through traffic (Me - I am traffic!).