You've hit the nail right on the head, we can theorise all we want, but none of us really know if any tactic is going to work untill you try it. There are some situations where long netting just does not work, then there are the ones where it should not work, but does? I think that the fact it can be so unpredictable, is what really makes it so appealing.
There are very few "rules" when it comes to long netting and sometimes those "rules" go by the board. I think it's fair to say "If it works, don't knock it."
TC