With respect, I don't think purplecthulhu is being either arrogant or dismissive, and I'd be concerned (given the number of friends you have in common, although I don't believe you know each other) if you fell out over this. He has been associated with IC for a large chunk of the last thirty years, and I am taking his views not as parochial defensiveness but as an insider's perspective.

If I were to attempt a partial synthesis of your respective views from various comments across this post, it might be that this behaviour is neither prevalent at IC nor confined to it, but that it is nonetheless very damaging both to women's safety at IC and to IC's reputation. Is that fair?