If a topic takes a turn that is rational and along the same original theme, by all means address it accordingly. I don't think that every topic has to end the same as it started. For example, if someone starts a topic about which fire starting method works best and it turns into a discussion about different firesteel properties and then even changes again to which striker works well, good deal. If it gets too far out of range, like if the topic started about fire making and then someone started talking about getting peed on by a black bear, and it wasn't while he was trying to make a fire, that's bad. You can start a brand new thread to talk about that. Also, posting silly pictures just for thr sake of posting or trying to make people laugh, it's not an sbolute no no, but try to limit it. If someone else already did it, appreciate their selection of a good picture, but don't retort with your own. The silly pictures have a tendancy to go crazy real quick. Get where I'm going? Just keep things reasonably on topic. If the topic evolves, cool. If it totally changes direction to useless shit, that's a no-go.