yes it is but only knowlege about great old one and his past is blocked. there is also that even if you read whole lotm you wont remamber everything. You are bound to forget some details.
But ultimately Abyss pathways should be more of a scum type. I don't think a person with strong moral compass could ever match the essence of Abyss Pathway (if we exclude BS jutsu or Almighty Power)
Criminals can also be innocent, if there just forced into that life and didn't have a choice. And the so called innocent are just people with a relatively better life's. Of course I'm just overgeneralization, but I think you get my point.