Yesterday I implemented a rule that prevents people from posting in topics that haven't been touched in one month.
However, I'll change it so that it only applies to the forums where topic-necro'ing is disruptive like some of the off-topic forums.
For example, I think people should be able to post in old topics in roleplaying forums, interest check forums, the character sheets forum, the articles forum, the gallery forum, and perhaps some others.
Though, like Lillian, it'd help me to know which topic you're trying to post in so I have a better idea of how people use the forum. :)
Edit: Ah, I see. Alright, I'll push out an update tonight that removes the restriction in roleplaying forums.