The reason I cant fully support/trust Anonymous is because simply put they are not an organization based on anything more than getting "lulz" out of people. In fact they aren't really organized at all, its an online melting pot of beliefs/morals that really isn't controlled in anyway or by any standards. Though it is a bad thing I do like vigilantism when our law abiding system doesn't bring the justice that is deserved.
Some claimed Anonymous groups bring out said justice in superhero-esqe ways are doing good all around the world. Some (in my opinion) take things way to far in their pursuit for "lulz". They are a dangerous enemy, and a strong ally at the same time, but in general I feel its best to just remain neutrally at arms length with them. They are the entirity of the Good and Evil spectrum.
So I guess my answer would be "all of the above" or "None of the above" =S