From what I understand, teaching is generally seen as a positive signal (if the boot camp is a good one), because it means they know the material well enough to teach it.
I can totally imagine the opposite becoming true (teaching is a negative signal), creating a positive feedback loop in the opposite direction, and turning the boot camp into a pyramid scheme.
I guess it all depends on the credibility of the boot camp, kind of analogous to universities, as a sibling commenter points out.