I can see why you'd say that, but in person, it actually kind of works. Even I fell for the gag with the first one I saw, totally thought it was a real guest.
Re: HHN. I agree complaints over use of others' intellectual property and the inclusion of Penn & Teller are premature. But I am scared if there is only one "true" SZ (rumors are it would be outside Disaster, in the back of the park). HHN needs SZs as you enter the park, and at this point, the Facebook generation is going to demand a photo-op zone as well (think Fear or even 7 last year). At this point it's as much a part of the event as the houses.