Well, I've worked my way through the thread and I'm not sure what the purpose of these exhibitions are. It seems like a freak show to me. I can't see children learning much useful about farm animals from roosters that ride around in cars and on motorbikes and let all and sundry handle them.
It portrays a completely inaccurate picture of natural rooster and chicken behavior imo.
There is this idea that the domestication of certain animals means they are no longer treated with the respect they deserve, or the caution warranted.
Post after post on these forums demonstrate that in the case here, chickens and roosters in particular are not the cuddly human friendly creatures some would portray them as.
It's the humans perception of these creatures that that underlies the problems these post report,
it is quite difficult to explain to a child and many adults that the rooster they are being allowed to pet and handle isn't really a rooster at all; it's a trained pet which no longer exhibits it's natural behavior. Some will leave such exhibitions with the belief that all chickens are like this and when they next see a member of that species may go to pet it with disastrous results.
A stranger attempting to pet a rooster or even a hen here will either scare them away, or get attacked. That is the natural response.