Version 3 (which was more of a prototype, testing some ideas) got around that by limiting account creation to 1 per IP, per day.
Anyway, I'm going offtopic slightly...
I need to find a good scripting engine too. I might have a look at the Lua source, and the Lua lisence, and then attempt to Uh... modify it. I tried making my own scripting engine a while ago, but I just got annoyed with it, and it turned into a mess. And I don't want to hard-code stuff in a DLL like I did with my first MUD. It was all well and good until a small mistake brought the server down.
So, if anyone can suggest a good scripting language (I've only tried Lua, and it's absolute murder to bind to C/C++ code), feel free to let me know. I seem to recall that Raduprv said in his post mortem for Eternal Lands, that Small was good for their purposes, so I'll have to check it out.
Well, this'll do for now. I've been awake for 24 hours, and it's only just past midday. Where oh where did my night go...