I guess I just trust people, had popups from 78 to 2010 & now the 19h, only used a pin with a wire loop to keep the hitch from opening when traveling, don't have to worry about keys either.
I agree that for most places I go, people are honest and very trustworthy. I have been in a few places with my boat trailer where the neighborhood was "rough", and that's where I did apply the lock. I have not seen any CG anywhere I've been, that would cause me to be concerned, and that's why my initial thought was to not bother with any lock. I do like to have something on hand though, in case I find myself in one of those rough areas, and need some level assurance.
2013 Jayco Eagle 31.5RLDS
2018 Silverado 2500 HD Duramax
I just bought the same lock two days ago and it worked fine with my trailer (17z). Like others I don't think it will do much if someone want to take the trailer. I have the trailer in storage and I hope that it will deter the thief.
David, I use that lock on mine. I also have another lock going thru the holes on the actual coupler. If they want to steal it that bad there going to get it, but it may slow them down a bit. Like others have said, locks keep the honest people honest.