Farhad didn't know what happened. All he knew is that Ohanian was supposed to at least be asked, and he supposedly wasn't even corresponded with, which could, by all accounts, not even be true. He was on the invite list, and decided against. I'm not sure what part doesn't correlate with "dropped out."
How can you possibly "drop out" of a panel that you explicitly said you were never planning on attending?
Dropping out means that you were planning to go and then you had to cancel. Whether Farhad knew this before or not, Alexis's email was very clear and so there's no excuse to claim today that Alexis dropped out of anything.