Why would it matter?

If the kids are young enough that they're being dragged along, they aren't going to care much. And it isn't like life is perfect and you can always have someone else watch the little buggers. So, if the kids aren't disruptive, and the parents are okay with the kids hearing the kind of talk you'd hear at an adult panel, that's a valid choice. Nobody on "stage" needs to worry about censoring themselves. They can, but it isn't mandatory.

If the kids want to go, nothing the panel is going to say will shock them. Any kid that's a fan of a show like that is already past the point where a panel is going to say anything worse than that specific show.