Some of the things they do have good intentions. Misguided though.
Like hacking the police departments computers to find the identities of the guys who supposedly raped that girl then bullied her into suicide. I understand the frustration and the desire to see someone pay for that but they don't have that right. They don't get to play judge and jury to the suspects. Rape is a terrible thing but unfortunately because of the stupid girls that just want attention or revenge on guys and call rape you can't really take anyone's word for it these days. Frankly it isnt beyond the scope of imagination to believe a girl would agree to do something like that (unfortunately I've known many such girls) and then just to be dicks they posted those photos which led to her embarrassment and subsequent suicide. So from that point it turns into whether or not someone should be convicted of bullying someone into suicide. Failing the evidence to prove something like that which is in fact hard to do you can't make a conviction.
The legal system isnt perfect. Not by a long shot but thats because it's completely objective. Designed to protect the accused as well as seek justice for the victim.
I have some measure of respect for them. Most people talk about how much they want to change something but don't have the balls to do anything to instigate that change. I call them sheep just bleating and waiting for the shepherd to come save them. These guys actually do something to enforce their beliefs.
So yeah. I wholly disagree with but respect their actions.