Fact is, dear Jungle strip, that I am not really concerned about grown ups, as they are grown ups and can defend themselves. At least they know what they can expect from people: harm, even if not done on purpose as you suggest.
I think yours is a nonexistent problem compared to a child being put in the situation we were talking about.
And I sure wouldn't rely on any FA's (or anyone of any other profession's) good judgment "only" when it comes up to my kid.
And, again, no one is talking to move male pax generally, but just the ones who MOVE next to UM.