As a side point, I remember that I was a JW but was questioning the JW system back when the Jim Jones Guyana mass killing took place.
It really made me focus on all the cult-like things that we were doing as JWs - however, none of the faithful witnesses were really much moved to investigate their own position in a high-control religion. There was even an article in the Awake about how bad the peoples temple was IIRC.
So, I guess that the Catholic scandal would also be viewed by good JWs as just another great example of how horrible babylon the great is - provided of course that they hear anything about it.