There are no actual signatures on this paper, just printed names. From past experience, that could mean that these people never actually consented to their names being put on it.
I know firsthand of one specific case in which someone called a rov and asked them a question without saying names, "What if a store would do this, would that be proper?", and when the rov said it would not be proper, the person put that rov's name on a kol korei against that store.