I think the next build will focus on the "allowed" and "disallowed" commands options with the pjirc, so one could limit their users from changing their nicknames, connecting to other servers, joining other channels, etc.
I'll also be looking into ways to deal with users whos names start with a number, but without having to strip out all numbers... Although this is kind of beyond the scope of this addon (it's more an IRC specification issue if anything)