While I will agree with the AFK Timeout (just like FFXI has) ... something that does concern me is the wait some of us have for getting into a Duty via the Finder, as on average it takes me 30-50minutes.
This is ridiculous on it's own, but often I don't really have much else available to me when waiting for them. It likely would be a single fix to exempt such people, but then I fear that would only cause most of the AFK people to simply move to clogging up the Duty Finder and those areas instead.

Something that is annoying the **** out of me though are the RMT Bots, there is no block, ignore or report that I can see... hopefully Square can get on top of this like they did in FFXI, as it's annoying and ruins the experience seeing these leeching ***holes.