If you think they should delist it then by all means, raise a petition or bring it to their attention. Perhaps the activist group simply has not had the resources to target this particular title yet.

You already know VISA and/or Mastercard will respond if an activist group raises enough of a concern so what's stopping you?

Ah right, you think if they got one game removed on a petition, they should somehow also be able to remove every single other game that may or may not meet the same criteria even though it probably took them significant effort to the the first game removed and this is some sort of "gotcha" on their moral inconsistency rather than a simple limitation of resources to try to get their will done all at once?