In relation to the OP, it has very good points, along with the replies Rally is making. So good to the point where I don't have anything left to say about the subject except for this.
I have an addon Marble Man made that i forgot the instructions to. Its still in my dropbox and im worried that if i release it like im thinking about doing ill be banned.
Mainly because it was a client that linked version 20 and version 21 to the same server using these really hacky workarounds, but it still worked. The v20 client was a static shape in v21, and the v21 client was a static shape in v20. On each version you could see the shape moving around, of course you'd have to be in the shape's window to fully see what was happening, but it was an entertaining thing.
Will I be banned if I release it? I know badspot and them are not too happy about earlier versions on the master server, though this is technically all running on a v21 server.