I've only had positive interactions with defcon23 involving multiple sales, adverting agreements, and escrows.
In other words: You only care about yourself and people who benefit you. Got it.The only person I've seen verifiable evidence they are an extortionist is you.
Which is absolute nonsense. It has been proven over and over again that defcon23 is an unstable blackmailer/extortionist, and this is confirmed by a huge variety of negative trust ratings that he has received. There is absolutely no evidence that Hellot has threatened you nor extorted you in any way. 
You do make a good point that proven extortionists shouldn't be trusted though... I would pose your same question to anyone who has left you positive trust.
The person increasing the trust score of proven blackmailers should definitely be trusted.