He needs something the size of DW, though. If he picks too small--relatively speaking--of a fandom, chances are high that he'll be found out quickly. But picking something huge like LotR or HP, where most people only interact with their small corner of it, he's less likely to get caught. Signal to noise and all that.

I don't know. I don't think DW has enough of the fantasy elements "Andy" seems to be drawn too.