Playing ninja isn’t that weird.
Doing it extralegally against a target with known (if not provable in court) affiliation with a murderously violent hate group would be a bit dangerous if they were baseline humans. But since they are superpowered android girls, it’s just added fun. Wouldn’t even get Phil and Kate in trouble since they had no idea that their friends were planning a raid. And the fact that the target was technically a government agency wouldn’t really cause problems since the government would be obligated to cover everything up to avoid the media firestorm that would result if it became publicly known that some of their employees were members of what would be called a terrorist group if it’s actions made it onto the news.