I think you missed the parent commenter's point that the reason they took their kid with them had nothing to do with the actual risk to their child (which they determined to be low), but everything to do with the likelihood of having to deal with other parents in a highly-litigious society (which they determined to be much higher).
Agreed - I saw a later comment by the poster which shows I misinterpreted the comment. My original point still stands though, just not applicable to the poster.