Thread:Alex2424121/@comment-4807601-20161224080750/@comment-26864513-20161224105640

This is the official definition of the term sockpuppet in the context you're using it in.

Sockpuppet, "A person whose actions are controlled by another!". If you're calling someone a sock-puppet, you're basically telling them that they're only doing whatever they're doing for someone else's interests and not their own.