Interesting question if we consider the recent case of Sinbad.io. Next mixer will pop up and get advertised again by heroes and legends .
For anyone doing at least basic research about Sinbad.io, it's been easy to spot how fraudulent Sinbad.io was: Sinbad.io was a re-launch of Blender, a famous mixer operated by criminals: Crypto mixer Blender has been rebranded to Sinbad, says Elliptic: https://cointelegraph.com/news/crypto-mixer-blender-has-been-rebranded-to-sinbad-says-elliptic
Have centralized mixers = get shady operators behind it
For Sindbad.io = operators wanted to wash own coins from crimes and hacks, get clean funds from Bitcointalk for mixing.
Sindbad.io operators abused Bitcointalk to have fresh funds for mixing criminal coins.
Sindbad.io operators are SCUM!