What they actually mean to say:
Legally we don't want to appear chasing, stalking, harassing and pressuring former members. That may be used against us in lawsuits re. child abuse.
Therefore we change the directive from a centrally organized effort to stalk ex members into something we can deny involvement in: each elder is now personally responsible to do the stalking.
If anyone asks, it wasn't our idea, we are not responsible for your actions, and you have never been a member of nor answering to Watchtower. Yes, we'll hang you out to dry.