While I completely support the sanctity of artist copyright, this type of Nazi storm trooper tactics must not be allowed to be used. 'Violators' must be allowed to give their side of the story and to take steps to remedy the situation before actions with finality such as closing down a graphic sharing group should be used only when the group owner refuses to curtail the illegal activity. Remember, the 'accused' has the right to be able to confront their accusers and refute any 'evidence' against them. Yahoo needs to start practicing these policies before they push themselves ever closer to their demise. They are no longer the only game in town. And the copyright police need to determine actual guilt before they ride in on their white horses.
Just my opinion.