As more posts or likes are accumulated the thread goes up. Unless it's about matchmaking or any one of the half a dozen other area's bungie is crapping the bed on and knows it, in which case even if the thread is getting posts and likes and sitting atop the entire trending list, it simply goes away from the lists. I still get the occasional troll comment from people trying to argue, they weren't deleted, just taken out of the lists that would let new people see them. Happened with this thread twice yesterday. That's why the 3.0