Could site owners freely decide who's allowed to post to their site without 230? Seems to me the ability to ban unwanted users would enable a decent degree of m

Could site owners freely decide who's allowed to post to their site without 230? Seems to me the ability to ban unwanted users would enable a decent degree of moderation without direct control over what's posted. It wouldn't have to be all-or-nothing, you could always give an offending poster the opportunity edit or remove a post to avoid a ban. Would that be a viable way to moderate a community?