just a sidenote - if bittorrent software ensure that no peer-to-peer interaction exceeds 30 sec. for any given title, would MPAA/RIAA/etc... still be able to claim "illegal dowload"?
When they take into account fair use, they take the entire case into account, rather than following any hard and fast rules saying that using X% is "fair."
In other words, no, there's pretty much no way they'd buy any attempt to game the system so transparently. That's why you need a lawyer.
No, the courts take context into account. So for example, it might be perfectly legal to post 2 sentences from a book on your blog, if 10,000 blog posters conspired to post a different 2 sentences to share the whole book, that would be clearly illegal. Furthermore, the law is interpreted by Judges, who are people, not machines, and they tend to take a very harsh stance against people who try to game the system.
In other words, no, there's pretty much no way they'd buy any attempt to game the system so transparently. That's why you need a lawyer.