I'd personally see no problem with that assuming you stick to your word. The reason K hasn't bothered allowing this is because given an inch, most people want a mile. It would be smart to introduce some kind of version name registration system where any script can register itself and mIRC will automatically report it in a reply... something like
/regscript mycoolscript/1.1.2
/unregscript mycoolscript/1.1.2
K could limit how long the text could be, disallow spaces, etc., to discourage somebody filling the line with only their information
and mIRC will report: mIRC v6.33 Khaled Mardam-Bey mycoolscript/1.1.2 someotherscript/3.4.2, much like an apache Server HTTP header reply.
The only problem would be the user may end up being responsible for unregistering the script from the list as I doubt authors would take advantage of infecting the list for advertising purposes and then not cleaning up if the script is uninstalled (not that they can even know if their script has been uninstalled).
The benefit, however, would be that it would allow the appending of information without the possibility of hijacking the reply, which I think is the real reason the version reply is off limits.
