If you do manage to fly the subsequent legs on the ticket after not flying the first leg, the airlines will reprice it using the point-to-point F fare and charge the difference to the credit card used to buy the tickets, so you won't get more than about 24 hours of flying this way. If this charge doesn't go through, the ticket is canceled. So this can be a very expensive way to fly. Trying to circumvent the origination rule is an impossible game to play.