As if it's common practice for anyone to search for a thread before they post a topic anyway...if someone wants to talk about something, and it's only ever been discussed ages ago, then I think it's perfectly fine if the discussion is brought to the fore again. It just means that the topic's still relevant. And chances are, I'll want to talk about it. If you've discussed the topic before, then surprise, surprise, you don't actually HAVE to discuss it (you didn't even have to click the thread link). Just don't spoil it for the others who haven't searched through the entire history of threads in this forum and actually want to discuss it no matter how well tread the thread topic is.