[mburns]

It's the very next definition of the page you are quoting.

Poach (verb) "to trespass for the purpose of stealing game; also : to take game or fish illegally"

[asdfologist]

That's the wrong definition though. Humans are not "game".

[skj]

That's the GGP's point, I think. The word 'poaching' is used because the humans are treated as game, and continuing to use that word continues to bring up that connotation.