Kids are young, 5, 3, 1 boys and they got into the grease on the ball and the ends of the bars on the EZ setup. I had them covered in plastic which lasted all of 10 seconds once they got into it. I know there are other options but they seemed magnetized to the grease! They arent near the rig when hooked up, I fail to see the danger of an unhooked coupler with a lock in it.
I was avoiding the Equal-i-zer due to a camper friends many issues with his. His was older but he had a lot of issues here and there. Brackets bending, keeping track of pins/parts, couple other things. He was also annoyed at mounting the ball when first buying it with a thin-walled socket that was absurdly priced from them or trying to find one locally.
We camp several times a year from small state parks to Disney. Vast majority far and away are the basic EZ-Lift style. After that would be the Dual Cam and I have only seen a couple Equalizers. I think I have seen as many Hensley/Pro Pride setups as I have Equalizers and almost always on an Airstream. I recall seeing one older Blue Ox and have never seen another Andersen. I get people asking about ours every time we camp.
I'll look more into the Reese DC/Equalizer/Blue Ox. They all seem to have their pros and cons just like any other hitch.
'15 XLR 27HFS
'15 Nissan NVP 3500 SL
Campers - Me, DW, 3 - DS (7, 5, 3), 2 large dogs