Hmmmmmmm would be interested in that MM.
In my imagination, halfhitch/clove family of lacings walk some; but i usually go with that when you reverse the 2nd layer to make girth/prusik family of lacings they don't? i figure it will be less, if not about nonexistant, but have never tested that hypothesis like that.
Any way, figure any open system (especially life support) should have a positive mechanical stop.
Tie,
Dress,
Set,
and Inspect.
Take all the slack out of the machine of the knot, so there will be no impact/slip that could cause other problems, as well as sieze tightly on the host line. Make knots that you are totally familiar with. This is one reason i like the double bowline with Yosemite tie off, as it is very symetrical (easy on the eye, well balanced, easier spot checking); as i will tie it in the rigging line and use it all day, attatching 'biners in the temporary eye, so spot inspection of a familiar, symetrical knot becomes more important.