In a thread some time back, there was a discussion about mis-hitching, in particular the term "high-hitch" was bandied about. In that thread the possibility of a "high-hitch" was given as a primary reason to do a pull test. I, and a couple of other owners of a certain hitch, were vociferous in our responses that since you cannot mis-hitch our favorite hitch a pull test was unnecessary.
That is the basis of this "Did so, did not" repartee. I don't do a pull test because the design of my hitch makes a mis-hitch all but impossible. Locking the handle open is not a mis-hitch, that's a brain fart pure and simple. If you don't own a B&W hitch apparently a pull test is the only sensible thing to do if you wish to avoid awful and dire happenings. :)
And that's the truthhhhhhhhhhhhhh.