Ok, so I have identified the problem. Far be it from me to identify a problem without identifying a solution.
The cause is the FaceBook style immediacy of low-tech responders; their feeding frenzy. That's fine, they can have their virtual activity, but the problem is these people have the power to vote down answers on subjects that they are actually have no experience or knowledge in (they may have read one page from a google search, but that is not knowledge).
Change the rep required for voting down to 3,000.
Give that power to people who have earned it by actually staying at SO long enough to earn it; and by providing enough answers that have been accepted by more than three friends.
Take that power away from people who have joined only last week., and only answered a few low-tech questions.
Basically kill the consequences of the Piranha Effect without killing the piranha activity.