so apparently when a thread gets locked you also can't downvote or upvote a thread, so if a thread is hidden when it gets locked it is locked forever. so i was thinking there might be a moment when all 50 threads might be hidden (which means 50 crap threads in a row)
anyway the closest i found was 49 (but since a thread gets pushed back a page everytime a new thread it will change all the time.)