Possible to turn off the conversion?

Hi, first sorry for bad english, I'm from Norway. :)

I have some movies on my server that I would like to share with my friends, but the problem is that I am afraid that they will spam the conversion .. :S
So it would be nice if it was possible and turn off conversion, and made so they could only use live conversion on just the server.. (:
Because if the spam with the conversion then the server and be out of memory, or so it will eventually crash..

Hope you understood what I meant and come to and look into it,
-Mathias Oki.

I realize this is an old post but rather than start a new thread I will just add to this one.

I would also like the ability to turn off conversion. I have no need for it. All the files I have on my server are m4v files. Conversion just produces another m4v of the same file. If a user wants a lower bit rate they can use live conversion. I don't like the fact that someone can "spam" my server with conversion files.