Yes, the not helping with sock puppetry is one reason why I give low odds of this ever being implemented. On the balance of privacy vs. discouraging abuse, I don't see posting even a hash of source IP for non-anonymous nodes as a worthwhile trade-off at this point. So I don't yet see an acceptable discouragement other than the convoluted idea of providing a level power that enables one to compare the source IPs of two specific nodes, which itself seems likely not worth the convolutedness for the theorized gain.

But as anonymous trollery will almost certainly eventually become an annoying problem again, posting a hash of source IP for anonymous nodes may become worth implementing.