Yes I have been thinking about this, since I posted it and I do agree with you. The boundary is for you. I guess I never understood that either about the timing.
Well maybe to restate it seems like sometimes boundaries are thrown around like a tactic. I never thought that, and never really needed one for myself until much later.
I do know that until the boundary is placed and enforced the mlc'er will not move forward. However that is not to say that just because you place it and enforce it they WILL move forward. They might just turn around and run the other way.