Personally, I think it's probably something not worth speculating on unless there's some evidence. This is almost like accusing the pope of child abuse because of the issues with the CC. Not sure if it gets anyone anywhere.
Authoritarian organizations seem to frequently have problems with child abuse scandal, but I think it might be pushing it to say it always comes from the top. Suggesting that the GB has one or more molesters on it is a bit sensationalist for me, and without evidence beyond the cult's myopic strategy to protect itself, I fear that a bunch of speculation does nothing for us, and could potentially turn away people who are looking for answers to their doubts about the cult.
Sorry. I don't mean to rant. I'm having a weird day.