i never prune members... many members chose to login and just not post. thats their choice.
plus having them remain as members gives you a larger member base total which in turn will lure new registrants. for example if i saw two forums on the exact same content, but one has 100 members and the other has 1200. id register one the one with 1200 not really caring how many of those actually dont contribute etc. it just seems that forum is more established.
also large member numbers comes in handy when selling advertising...
i dont prune or remove etc. i keepem all! hehe
