I don't think it would be possible to have a newbie jail in an IRC channel. The only way to get out of newbie jail would have to be by viewing the IRC channel for long enough, but this oculd easily be faked with bots who would eventually put whatever spam in the channel.
dont think of it as a newbie jail. think of it as a general chat room.. and then when someone shouts that they have a good idea with a good explanation. they can then move into another room to discuss it with less general public screaming. allowing those in the chatroom to concentrate on proper topic discussions and boot out anyone interfering with the flow of idea's
here is a brilliant idea..
i have already opened
http://webchat.freenode.net/?channels=#cryptoideanoobso if you wish to talk at a more rapid rate compared to this forum about setting up a chat.. use that room i just linked to and then go from there, make your own up.
i leave my computer on all day so the room should have someone in there all the time
Ya I guess having a separate room when newbies can discuss their newbieness and then a main chatroom that you can only post in (but everyone can view) once you are no longer a newbie would work. I would think that once it reached a large scale, promoting someone to no longer being a newbie would need to be somewhat automated which would still allow it to be manipulated somewhat.