I agree with FiberOPtics .

I have to admit that everything i know in irc scripting is from other people addons and scripts

Reading other people code is the best way to improve your knowledge and help them make their code better( Linux ,i believe , is the best example)

Ofcourse it will be always a possibility that someone will "steal" your code,but i don't see why he would do this in mirc scripting because:
a)He won't make any money from it
b)I really don't believe that you can write any new addon .Almost everything has been written before by someone else.You can make a better layout or do it more customizable but the main code will be the same.