Personally I'm torn between agreeing and disagreeing with you.
Yes, the forum is slow, no, it doesn't mean that any random threads should be okay.
For example, I met this guy in zOMG who didn't play for about five years now. Would it be okay to make a topic about how we were in the shop the other day together irl and so?
And how I miss him in zomg? I don't think so.
There are some threads that yes, belong in z!f, but others, no, not really. Slow moving forum isn't always a bad thing, even though, yes, it might seem that way to some people.
Also, if something is posted online, you can't stop people from replying now matter what you say, unless they decide it's better for them.