Um.... no. You don't remember correctly. I would never have used the term poaching to describe headhunting. I would have used the word headhunting or recruiting out of other teams. I would have only ever used the word poaching to describe illegal harvesting of a natural resource. For example, poaching redwood trees.
In fact, to the best of my recollection, this thread is the first time I've ever seen the word used in this fashion.