Yes many posts should not live forever in cyber space. After a thread has gone stale without views or replies for 1 year it should be deleted.
It is a 24 hour a day community and FSM staff cannot be online checking in all the time. A select few trusted active members should hold the power of deleting conversations of poor taste or heated discussions resorting to name calling. Not the power to 'Ban' offensive members, more like the '24 hour suspension' button.