Kill the time out.
My vote is when finished reading and ready to exit then mark all fourms read.
I sometimes get distracte Oh! look a kitten, before finished reading all threads. A PITA to have to search a thread all the way through to find first unread.
Life's journey is not to arrive at the grave safely in a well preserved
body, but rather to skid in sideways, totally worn out, shouting,
"Holy crap. What a ride.!"