Shouldn't there be an indicator for the old threads that are bumped up to the top of the list only due to a fellow post ???
Though the date(or time) is already mentioned below the thread title, it generally get unnoticed and many used to post on it again. What I was thinking of was a visual indicator like we already have for New, Read, Posted, Popular (etc.) threads, so that there won't be any confusion in identifying that its a dead thread post...
What do others say ???