Hang snatches are also awesome for traps as well, something I got from reading Jim Wendler.
Agreed, or reeves deadlits, but these are both very advanced movements. Some people dont know what a 1/2 1 arm upright DB row is! We can't expect them to know how to snatch properly while activating their traps.
Correctly, yes, but I am of the opinion that unless you are an Olympic lifter you don't really need to the Olympic lifts in perfect form. Just don't do what cross fitters do and do 20 reps of a movement that is supposed to be 3-5 reps.