One of the available videos
shows an easy solution to this security problem. Notice the two green arrows. Place a thinner nylon zip tie through the hole at the end of the release lever and through a hole in the body of the traveler (upper green arrow, technically a "screw drive shuttle assembly"). Cinch the zip tie up. It will be strong enough to prevent manipulation of the release lever by a wire with a hook, but will break if the owner pulls downward on the red release cord with both hands and a little body weight.
That may work on many garage door openers, but this one is a Genie screw drive opener, and it has no hole in the traveler. I could drill a hole through the body of the traveler, but I would want to know more about the internal structure of the traveler so I do not weaken it or damage something inside.
My plan is to add a shield around the release lever. That process begins with making a cardboard pattern. Notice that I have trimmed one corner of a piece of cardboard so the edge is now parallel to the opener's track. The gap indicated by the orange arrow is smaller than it appears. A spring clamp temporarily holds the cardboard in place. See the yellow arrow. (The release lever is in the released position in the photo.)
- Cardboard for a pattern
- 3/4 inch pine
- 2 bolts 1/4 x 3 inch with washers and self-locking nuts
- 3/8 x 5 inch bolt and nut
- Marking pen