You don't have to have kids, or be involved with kids to know right from wrong... I didn't have kids till I was 27 and I certainly would have known putting another persons child in my car was probably not a good idea unless I had permission from the parent, not the word from an 18 year old with a checkered past...
Not to mention we were all kids at one point and probably all at one time or another were left in the care of others and I as a child knew that even if a friend was over and my mom wanted to take us to McDonald's for lunch, that friend would call home and ask permission first and let his parents know and vice versa.
MR seemed to have no problem at all portraying himself as a worldly, compassionate all around great guy on POF, surely someone like that would know the ins and outs of child care, and have a good sense of right and wrong... Not to mention working as a "dance instructor" (bulk of people involved in dance lessons are minors) he would surely have had some of the "speak out" training that is now mandatory amongst coaches/ instructors here in Canada where working with children is involved... You know the common sense stuff that is expected from an adult when around children and what children should expect from an adult entrusted to their care....