Speaking of sig lines... (I'll get back on topic in a moment) ... I would really like to see those limited to five lines plus a separator line, and it would be wonderful if the system could add the separator line automatically. Some people's siggies take up more room than any of the posts they ever make and the ones without a separator make me go "huh?" until I realize it's not part of their post and I've seen it a hundred times by now. Some are full of extra lines that make the siggie big without adding content, adding to the number of "scrolls" we have to do to go down a page.
Back on topic ... There are two different issues. One, an off-topic post. For instance, I just got some chickens last night and by morning one of them had disappeared. I have posted about that in my two social groups, but it really has no place here except in General Chat. So something of the nature of "a funny thing happened on the way to the forum today" doesn't belong in the two main mystery shopping forums or the merchandising forum. But it might make for an amusing anecdote in General Chat. (The chicken did reappear a few hours later.)
The other issue is the hijacked thread, where in responding to an ordinary MS post, someone comments or jokes about something, and others comment on and joke about that post, and the topic drifts totally off-topic for several posts. I think this should be tolerated since it was a spontaneous departure, but if it goes on for more than 10 or 15 posts, it should be reined in. People open a thread because of its subject line. It's mildly annoying to open a thread that says, "Is anyone having trouble getting paid by DeadbeatsRus?" to find that this thread was started three years ago, the subject drifted to a conversation about sewing machines, it died two years ago and has just been revived by a newbie posting, "Boy I sure loved my mother's old Singer." So I would support the idea of locking down a thread that has been answered and then drifted. If someone else wants to post about a payment problem with DeadbeatsRus, they can start a new thread. Whatever was going on three years ago is not going to be the cause of whatever problem they are having now.
But as for evolving a new concept ... consider a forum called "Member blogs" where each member can start one thread that is titled, e.g., "D "speakes" about life on the farm" where I could post amusing chicken anecdotes and if someone wanted they could "follow" my thread from a bookmark to see if I posted what the sheep did to make me laugh last week. Or, if people have a personal blog elsewhere on the web, they could post a link to it, and people could follow the blog directly there. So that might be a fun community thing to do that wouldn't have to be about mystery shopping.
Several of us are writers; we might gain readers that way, or even people to help critique chapters.
Some might be crafters who could share quilt patterns with each other.
Some might want to swap recipes on their blogs.
Our lives aren't all about mystery shopping; those who want to share with others could do so this way.
I don't know how many shoppers would have time to keep up a blog, but the option could be provided if there was enough interest. I don't really think there have been enough off-topic posts in the wrong place to be too concerned about it at this point. (However I don't read every thread, so maybe there are more than I have noticed??)
Time to build a bigger bridge.