I don’t really want to side track the discussion with a tangential conversation, but I don’t want people thinking I’m just making up things just to be inflammatory or whatever either. So at least according to the top comment on this by someone who is on the Discourse team “Flags from some well trusted users might perform automatic actions like hiding.” There’s also multiple comments in this discussion from October of last year where multiple people (including moderators) saying a user can hide a post simply by marking it as off-topic.
So unless the settings have changed since October, yes posts can be hidden just by flagging them. At least if it’s done by someone with a high enough trust level or for that matter multiple people, but neither one of those scenarios make what I said false. Although again, that’s contingent on the settings not being changed since the end of last year, but there’s nothing to indicate in the conversation that I linked to indicating they have been.