This sort of cavalier attitude is going to get them in trouble; I'm honestly surprised that this hasn't already gotten them into trouble. Hack Club has enough money that they can easily be a worthwhile target if any of their decisions turns out badly.
I'm going to be a bit oblique here because I don't want HC to take this out on my child, but at one of the HC events, the "figure it out for yourselves" lead to our child making decisions and taking actions that could have very easily turned into life threatening. Another situation led to our child being "ditched" in a foreign city and unsure how to get ahold of anyone on the ground to help.
Hack Club is a great idea, and I'm glad it exists, but I do think that the way it is currently organized is going to end badly.
I haven't heard about Hack Club until this very story, so forgive my ignorance, but what exactly happened here? According to their website, it seems to be about a community for teenage programmers, who build open source projects together, sometimes during events. Looking around at the types of events they host, nothing really looks life threatening at all? I'm not doubting your experience, just curious how a bunch of programmers could end up in a life threatening situation during those sort of events.