To avoid accidentally necroing a thread, check the date that the most recent reply was posted. If it's over 30 days, don't reply to the thread (Though generally it's best not to if it's over 25ish days, since it's not specifically 30 days).
We're quite friendly around here. I'm sure most people would be willing to help out if you run into a problem on the forums or are confused about a few things (Like with your necroposting issue).
Comments on Profile Post by PurpleHeroZ