Mortimer Schnerd, RN wrote:
....

My opener has been known to almost completely close, then reverse itself. ...

That's indicative of an adjustment problem or an obstruction -- either
the stroke is a little long or there's a building binding that on
occasion is just enough to trip the force-limiting reversing switch.

An adjustment/cleaning/lubrication should eliminate the
problem...ignoring it will probably just increase the frequency of
events slowly.

--

As someone said if the door is in proper adjustment this feature would
be as safe (no less a liability) as any already built into garage
doors.

I don't even fiddle with my garage door for days before I leave the
state to go to my summer place.. I can't imaging leaving the house for
the summer through the garage door. I dissconnect the power and lock it
into place.. I'd wonder all summer if I closed it or if it
took...LOL..

As it is, I make a false departure on my trip (1200 miles) . I lock up
and shut off everything real good , then I head out on the road (about
half a mile) with my car packed. But I go back and get out and check
everything one more time as a fail safe..

When I'm living at either place, I do what the other poster does , I
watch it annaly till it completly closes and often look back. Sometimes
the IR trips can work too good on those things..

The cat squishing option can only be a good thing..