Attacking the Catholic Church in 2012 over the priest abuse scandal is like attacking Britain over John Major's policies.
The abuse scandal was a pattern of abuse and cover-up that exploded into the media spotlight in the late 80s/early 90s. The Church did wrong, but since then, they've done a lot of right - there's a zero-tolerance policies, lots of priests have been defrocked, billions in settlements have been paid, hundreds were jailed, etc. There will always be sexual abuse in any large organization with access to children - schools, Boy/Girl scouts, the YMCA, the Mendocino Physics Club, Gencon, whatever. So yes, there may be some that goes on today on a small scale...but what has changed is the organizational response. In 1970, a Bishop might have shuffled a pedophile priest to a different parish. Today, there's zero tolerance, formal processes, and a much greater awareness.
So...why attack in 2012? What is the point? If this was 1990, it'd be more understandable.
I think "anonymous" (aka a half-dozen bored kids) is just desperate to remain in the spotlight. The attention-getting is more important than any "cause". In fact, attention-getting is the cause.