I agree with this but there seems to be a weird aversion to torrents on FAKKU, as evinced by the all too frequent tone in the Requests section when people respond with a torrent link ("torents dun wrk 4 me...") and the discussion about torrents in this very section. That means there might actually be quite limited support (and limited seeders) for the idea.
Also, as far as I know, every time a new doujinshi is added to a category (e.g. a new Bleach doujinshi is added) the torrent would have to be deleted and then a new one made, now including the new doujinshi. That means all the current seeds and peers would just have their torrents killed (getting "Invalid Torrent" errors or something) and all the seeds would no longer be uploading anything and all the peers would just be wondering what the hell happened to their torrent. They'd then have to go and download the new torrent and wait for new seeds to appear when they could just download the new doujinshi directly from FAKKU. This would happen every time a new doujinshi is added to a category. It could actually be more annoying and fiddly than just downloading each new one as it comes out.
That said, it would really cut back on bandwidth for FAKKU so I think a good idea would if we (a) only do this for categories with a lot of uploads (like Naruto doujinshi or FAKKU translations) so we don't have to go nuts making new torrents all the time for series with only a few doujinshi anyway and (b) only update the torrent every so many months, regardless of if there's been 1 or 20 updates in that period of time.
Edit
Oh yeah, another catch is that we'd have to have all the doujinshi on our hard drive for this to work. I don't even like Naruto so to have hundreds of Naruto doujinshi on my hard drive, taking up space, isn't something I'm really up for. So you'd need to find someone that actually wants to have all these hundreds of doujinshi on their hard drive to begin with.