Bringing the "Alex should have X on...." posts to reality

I've noticed quite a few posts over time of the form "Alex should have X person on Within Reason". I have, in fact, posted such things myself. My question is: how likely is it that we in this subreddit would actually be able to influence him towards having a certain guest on? If we don't have any chance of this, then these posts are just wishful thinking.

Obviously the mustache petition managed to get out and catch his attention. Are there other channels that we could use to give our suggestions to him?

On that note: Personally my top guest choices for Alex to have on would be Tom Holland, Tim Mackie, Richard Carrier, and NT Wright