Exploiting people from a lower socio economic background isn't cool. Sam, Shane and channel 9 despite what they say are smart enough to know that. I'd love to see Shane's reaction if a member of the public used a sign on any of his children.
The only person who sees this as exploitation is you. The rest of us see this as larrikins putting themselves out there to give everyone a bit of a laugh. Either lighten up or fuck off. There are far too many miserable people like yourself to act needlessly offended over such insignificant issues.