OT:
Don't worry about reviving old threads, just as long they aren't controversial/flame bait ones. Some suggest newbies do a search and use existing threads, while some say start a new thread...somebody will always complain and nobody can really agree what is appropiate or enforcable.

At many other forums, there is an unwritten rule/etiquette that if a topic is a repeat, the forum management prefers that posters refrain from participating in the thread if the posters feel the question has been asked and answered too many times in the past...it's a good compromise rather than flaming a newbie while not even answering the question first. Other members can provide their opinion on the topic and in most cases, it will either be a repeat of past answers or personal experiences with a new or popular products. In any case, it keeps the forum focused on helping each other, helpful tips and money/time savers, sharing personal and practical solutions, etc etc. Topics/threads older than 6 months to a year are usually put into an archive section for a "read only" to topics brought up in the past, but that's up to each forum owner and they may prefer to lock threads instead or just keep them open for any future replies/comments.