An option for the owner of a channel (or a group) to set a flag so that all registered users become aware/informed that they can be contacted directly by admins (and only by them). In this case, users cannot report admins for spam. The purpose is to prevent trolls from disturbing the channel management. All users who enter the channel/group, where that function is enabled, are informed, by automatic message or icon or something else, that in the future they may be contacted directly by an admin. If one does not agree, the only option is to leave the channel.