The community currently going under the name "skeptics" usually attacks easy targets that are already unpopular with the intelligentsia, like homeopathy. Let's see what Joe Nickell thinks about many-worlds first. Shermer and Penn & Teller have failed similar tests.

EDIT: Being a skeptic is just as easy (in fact, the opposite) of being a contrarian, and the test of whether a skeptic's cognition provides bayes-fuel is whether they fail to critique contrarian theories that are correct. This deserves a post which I might or might not have time to do.