I'm trying to take a balanced view here, but it's very difficult to see this as anything other than a safeguarding issue.
I was a girl guide for many years and I enjoyed it very much. But it does require absolute trust from parents. You are allowing girl guide leaders access to your children, in privacy, often overnight and without other people around.
Some of our activities included going to a guide leaders house, going in a guide leaders car and sharing sleeping space with guide leaders.
Would I be totally comfortable with my daughter doing these things with this person? No. I would probably remove them from the GG unit altogether.
I don't feel as though I'm being transphobic (although trans people would certainly disagree) I'm just thinking "better safe than sorry". I can't believe I find myself saying these things. I have never identified as a person that is "against" the trans movement, but somewhere along the way, a line has been drawn in my mind.
I believe that allowing MTF trans people to join the girl guiding unit and take young girls on camping trips etc does put young girls at unnecessary risk.
And, although I find the posting of sex stuff on Instagram a bit weird and unprofessional, I'm not leaping to conclusions that they are a pervert because they like BDSM. That would obviously be reductive.