I've my doubts about the effectiveness of such a course. For every JW that is spurred into free thought by outright assaults, there are 10 who are solidified by the opposition (Gen. 3:15, Satan's organization, et al). The organization uses outright opposition to bolster its claims.
Time and apathy are the cancers that truly deteriorate the organization.
I've been getting notes in my door and more visits recently. If the time comes that I'm given an ultimatum, I will respond vigorously, but with individuals (not an entire organization) in mind, and with devastatingly kind words.