Um,,, for starters read the posts. But if you're too lazy to don't jump into the middle just to change the subject, though I guess it does divert attention from the questions asked.
As for the rest, since you obviously didn't notice, the suddenly-obdurate Doctor posted a bit about Alfred Wallace, which I chose to ask her about. It's not really "changing the subject" to ask about something she brought up. If she didn't want to talk about it, perhaps she shouldn't have posted it, and if you don't want to talk about it, then don't talk about it - let her come forth and speak for herself.