Speaking just about my thoughts, I don't particularly think "Signing on/off" will change. I've mentioned about posting in other places to find people after saying you are signing on like 3 times in that thread.
About just deleting posts if they are off-topic, Hanna and I have been but every few hours there will be a new string of posts that are off-topic after we have gone through and removed posts earlier. It's hard to stay on top of especially since I can't get on as much as of late so Hanna will have to share her thoughts on what it has been like lately.
I am sort of not fussed on the whole "Signing on/off" thread as a whole as it has one and only one use which I find sort of a waste, whereas the "Friend locator/gps" topic could fill both the role it does currently as well as the "Signing on/off" if people just expanded more in their post about where they and how they long they will be there etc it would work fine IMO.
Those are some of my thoughts on it though but to sum up:
Hanna and I have been trying to delete off-topic posts as much as we can but there are just that many, in "Signing on/off" specifically not including everything else, we can't keep up.
I think a better way to combat it would be to properly utilize a multipurpose topic eg "Friend locator/gps".