Would it not be the best case scenario to have the people who have an impulse to hunt people, be hunting people who are pedophiles?
The problem with supporting vigilantism is that vigilantes are wrong a lot and there is no recourse or protection against that.
Cops themselves acknowledge this
"His one-man crusade has led to the arrest and criminal charges being filed against several men,” it said. “He has also mistakenly identified someone as a sexual predator who was not.”
“It’s ok if it’s people I don’t like” is not the mindset of an emotionally mature human.