Gravedigging: Posting a reply on a long unused thread. Adding legitimate new material is permitted, but the acceptable age varies from forum to forum. Check the stickies in each forum to determine the standard for what constitutes gravedigging.
Firstly, what is considered legitimate material? If I found a post by searching for information on an issue on Google, pick the thread that best addresses the question or issue I have, and post in it with a question or information I have about the issue, is that considered legitimate? If not, that seems a real shame, because it basically makes all the power and function of Google is useless to help with genuine questions, information, or comments. Should I start a new thread with my question instead? It seems like that would be less desirable, because then the forum would get bloated with multiple threads about the same issues.
Secondly, where exactly in the forum is the information regarding this located? The information from the thread quoted above says to check the forum stickies. I'm not really sure what threads are stickied (because none of them are labeled as such, either with words, images, or a mouse hover affect as far as I can tell), but I'm guessing it must be the threads labeled announcements, because they appear at the top of the page, and that's usually how stickies are designed to work; by placing the important posts at the top of the page so you have immediate access. I looked in a few of those, and couldn't seem to find any information regarding what constitutes gravedigging.