I am not defining dark, it's about what people think when they hear the word. And what would 100 people answer if you ask them eg what the 'dark' side of the internet means?

Decentralised Exchange completely covers it. First words on bisq website: Exchange, Decentralised. Almost everywhere it is described as such or p2p exchange.

We have no disagreement about using tor being ethical, my point was about using smart language. Using 'dark' makes a totally unnecessary association with illegal things. This is the reason darkcoin changed their name, probably the only good decision they ever made.