The other thread was a discussion of that immediate, visceral, primeval response hardwired into our species as a mechanism for our very survival. That's a different thing entirely to finding someone a bit creepy, or not particularly liking their energy or even them personally, as is mainly being talked about on this thread.
I've never had that terrifying, warning 'gut feeling' about anyone who hasn't been in my immediate presence. Which would make sense, because that's its function and it's a largely automatic response (like fight, flight or freeze). Seeing Jimmy Savile on TV was therefore never going to have the effect of setting warning klaxons off.
As for the ongoing conversation about Packham, perhaps Megan doesn't have a step father who can accompany her to her graduation. She does have one who travelled places with her, related to her, taught her photography and all he knew about wildlife, and gave her the gift of his time. Would that I'd had a father like that.
The guy is a good mentor, who encourages young people along their career paths in natural history, who visits universities to try to relate to autistic people, and who gives a young, non-verbal autistic man a voice on his programme and tries to show people what living with autism is like. Yes, he's impassioned and doesn't care a damn about others' disapproval, and it doesn't always make for popularity. Well, good for him.
He gives every impression of being a thoroughly decent human being. I don't understand the dislike for him at all (and the tune's certainly changed from earlier Mumsnet threads).