While I do not think they were in the right to have the users “unmasked”, my understanding is that the users in question were talking about how the Austin internet provider, Grande, was good for torrenting, so the attempt to unmask the users wasn’t meant to get the users in trouble but to show that Grande benefitted financially from a lax policy towards pirating, so them not mentioning piracy in their comments wasn’t necessarily the end of the conversation, if they were willing to say now that it was in reference to piracy. I do think it sounds like grasping at straws, but I imagine the potential value they were hoping to get from Grande was worth that grasping to them