Fatfreak: The only potential fallacy I see in your post is that Legal would immediate stop illegal activity. They would support it if they felt they could somehow justify it under "freedom of religion". Watchtower Legal will feel it is above the law if they are convinced that Jehovah's way is more important than any law of mere men.
That said, I do not believe for one minute any story about Watchtower hackers etc. The Society will likely act on reports from elders who do 'monitor other users' activities but only after cautioning such ones about the dangers of continuing their activity online. Brooklyn would not assign people to hack or monitor Facebook. In cases where they are involved or potentially involved with an individual, they will look at that person's online activity just like any lawyer would.
The last thing I would mention in regards your post is that they could still disfellowship the person who is a whistleblower, even if never announced. I was never officially disfellowshipped but am treated as such. So they might not publicly go after someone but the gossip/rumour mill is very strong among 'the faithful.'