I would not trust the Pharisees to know who was and was not a false prophet, and I definitely don't trust the Catholic church. So, who are the ones who called them false prophets and who were they so I can do my own research.
It seems everyone is basing their stance on someone else's opinion, although yours does seem to be verifiable.
That being said, it may be true that 11Q13 is from a false prophet. We can not know that for certain either way though without more information/proof. So, we can not say it is false, correct?
So if someone is teaching the ideas and concepts taught in one of these scrolls, is it righteous for us Christians to squelch them because it is not in our canon?
If you claim you are only allowing the canon to be taught, then I would state that you are/could be blocking God's will, especially in these end times.
We, as Christians, have every right to defend the canon as being the inspired word of God. We do not have the right to say historic scripture, such as the books of Enoch and other, non canon books. [Edit: ... are not inspired by God.]