It's ok, no one has to agree w me on this one.
No, they're not "smart links" and yes I believe they'll keep the trailer behind me if I'm tooling down the road and forget to latch the hitch. And no I'm not absolutely certain they'll let go if/when I'd rather they let go than stay attached, but I drive enough narrow mountain roads with trailers big enough to take me with them off the side, that I'm hoping if that were the case I could get em to cut loose.
And yes, I've had it happen, someone came over center line and clipped my trailer, with theirs, I believe. They keep going and I couldn't turn around to get them. Luckily it was just a minor sideswipe that took out my fender and front trailer tire. Also had another RV come over center and take his mirror off on mine because he had no idea how wide his rental was. Actually told me I should have moved off the road because his RV was "really wide". Weird, because I had an 8' wide camper on at the time too and looked in the mirror and was riding the outside of the fog line because Wally was over center line.
Oh and saw it last week on Chinook pass, someone came over center and took the front of a pickup off on the front corner of a camper. Camper was fuubarred and not hooked up after the incident. Not sure who was at fault, but lucky it was a straight stretch of road where it happened.
So yeah I trust my ability to latch my trailer hitch over EVERYONE else's ability to stay in their lane.