But that's the same for forensic science. A perpetrator could spend years studying police investigation methods in order to fool them or evade detection and they may well be successful, but the other 99.99% of perpetrators won't spend years studying this, and will get caught out.
Likewise, the publishing of every known sockpuppetry detection method would only affect the minority of puppet masters that choose to study first and become experts at fooling the algorithms. I'm guessing that would be a very small minority as most wouldn't take the time to do this.