User blog comment:Kate.moon/Ask Phineas and Ferb Comic-Con Panel Your Questions/@comment-5289913-20120713124819/@comment-961279-20120713142955

I can answer this one now. It is a standard policy of pretty much all TV shows that they do not use any unsolicited scripts, story ideas or fan fiction. Many of them will specifically not look at them. If a script arrives in the mail, they send it back unread, and most time the package isn't even opened.

The reason for this is that too many legal problems can arise as to where an idea came from. Several examples regarding the Harry Potter books can be read on the Legal disputes over the Harry Potter series page on Wikipedia.

So, even if they happened to see what you sent, they can't use it and they probably will not even mention it.