I don't think there's anything wrong with it. In the case of Hugh Jackman, he's a lifelong wrestling fan and you could see that he really enjoyed the appearance, he had fun with it and more importantly the fans had fun with it, contrary to most of the celebrity guest appearances WWE have had in recent times. Sure, it was at the expense of a guy who many are a fan of; Damien Sandow, but on the other hand, would Sandow (or indeed Ziggler) have been on Raw otherwise? Most likely not. And judging from the segment, they both had fun with it too.