I think it's reprehensible that some people chose to bring their children to this event. Children should be in school, or home playing, or at practice or a scout meeting, not walking a picket line supporting something of which they have no understanding. Work problems are an adult's problems, and parents should not burden their children with them. Besides that, there is a very real potential for civil unrest and even violence at these things, and I wouldn't want my children anywhere near that. That's just irresponsible parenting.
That said, I think that informational pickets, and even the potential for a strike are going to have very little impact on the outcome. NJ's customers are the well-heeled, who tend to have a far better understanding of business reality than does the typical blue collar worker that these events are aimed at. If there is a strike, there are plenty of other options available for these travelers, right down to the charter operator at their local airport.