This thread was created simply to keep from diverting from the subject of Cathy's original thread about India and Nepal where the discussion was evolving.
This discussion is not related to the original subject, Nepal and India, so I decided to start a new thread.
Sealord - in a general sense I agree with your post in the Northern India & Nepal thread, especially the part about no one 'owns' a thread. Posts within a thread often spark side discussions. For me, as long as they are generally about the original subject, tour, area of the world, etc. then I'm perfectly good with some diversion from the original post.
If they start to go a completely different route (like your example of the Eiffel Tower) then a new thread probably should be started.
I know I've probably been guilty of joining in on some diversions, maybe even starting one. I think it's easy to get caught up in or even start a diversion.
As an example, someone might be posting a daily log of the trip that they are currently on. During that process they post a picture or make a comment that triggers a memory, that leads to a post that may start a diversion thread, with no malicious intent.
Let's say in a persons daily trip report they talk about or post a picture of a meal they've had. It triggers a memory of a similar meal that you've had on the same trip or a totally different trip. A person decides to post related information based on that memory of their meal. Before you know it the thread explodes with discussion of meals, foods, etc. to the point that the daily log of the trip that started the thread gets lost in a discussion of meals, foods, etc.
I'm not saying whether this is good or bad, it's just so easy to do. It's kind of like the ebb and flow of a conversation between multiple people. They rarely stick to a single subject.
That said, personally I would hope that diversions are brief. If more detailed discussion is desired then I'd prefer to see a new thread started.