So in other words unethical behavior is OK with you as long as it's in the Darwinist cause?
Since I do not see a [for example] police undercover agent working as a "plant" in, say, the Gambino family as unethical [the Gambino family is, or could plausibly believed to be, harmful], I reject your argument. The same "is, or could plausibly believed to be, harmful" applies to this misnamed "idea" as well.