Good design doesn't need everyone to bluntly repost replies fOr ViSiBiLiTy. If the whole discussion is already targeted at an appropriate audience (for example a Community Relay), you can use other UI's than an OP feed to surface valuable conversations about the common interest of that Community. There's no problem with re-targeting a publication to a new group of people that is probably interested in it. There are simply better tools for that job. (sharing in chat/community/group, tagging specific profiles, embedding in another publication...)