Educate people how some witness have this much HP, unvote those witnesses and bring those who care about the community and this blockchain.
I believe when leaders are fair and just, everyone else will follow. If they act shady, eventually most of the community will start to lean towards those shady activities.
Hope I'm wrong.
In other words: we need to change our mentality.
Mentality needs to change in many ways. I wouldn't mind witnesses being held to a higher standard in some ways, considering they are voted into their position.