A couple of questions about suppressing posts

After a bit more experimentation, it looks like I’m still seeing hidden threads in the lists because I’m an admin. When I visit the pages directly with a trust level 2 user account, I can still see icons and messages that say that the topic is hidden. What I’m trying to do is make it hidden but not show any indication that it’s hidden to the users – otherwise it’s potentially going to start long discussions that take up a lot of time. Is there any standard way to do that?