Definately some good ideas and I'll have a look at the set-up to see whether I can make adjustments to delete posts.
Let me give you a little background (a little boring...) about the set-up though and why I've tried to keep the forum fairly basic so far...
The 'add ons' to give extra functionality are basically written by anyone and I've had a few problems in the past where add ons have caused a problem where you can spend hours trying to work out what's broken. They can also introduce security problems and a site can get hacked - I've tried to use paid-for add-ons that are supported by a company rather free add ons by individuals who can vanish just when you need help.
We've had a 99.92% 'up-time' this year which is fantastic as websites go.
Every process on the server uses memory and 'add ons' can use alot of memory if they are poorly programmed - if the server reaches its limit, the site slows down and then, it starts to kill 'processes' and that's when things start to break. The next step is the site goes offline and I need to reboot the server. This has happened a half a dozen times this year and it's really hard to identify which website (the blog, forum and website run on the same server BTW) and which process is causing the problem, other than removing each one, one by one -or- increasing memory (expensive), it's hard to resolve.
Anyway, I hope that gives you some background information about the forum.
A little bit of history...
There was a setting that meant posts that hadn't had any activity after 30 days would be deleted from the For Sale section although Snifter, the first moderator we had (when we were just a few hundred members) asked me to disable this as she was going through posts and manually deleting them at the right time - but I'm sure I could find this setting again and re-enable it and will look into this shortly as I think it's very useful.
Keeping posts on topic....
I think is all about moderation, there's not a lot of automation available here of course. Some forums I have been to (usually to do with software) can be extreme where they will only answer the original question or move your post to a new topic. It suits their forums where you ask a question and once it is closed down, gets marked [resolved] and moved to a different section.
Personally, I think this can feel too strict for forums like this and can take a huge amount of moderation. Moderators are volunteers and we want the forum to be pretty easy going.
Topics do wander and some re-ignite after a long period of inactivity but I think this has to be the case. We do occasionally split topics but not very often.
I'm really happy to hear the suggestions, we're always looking to improve the site in some way and I'm always chatting to the Mods in our Moderators Forum about how we can do this.. there are lots of things happening every single day in the back ground to keep the forum running smoothly.
A bit of a long post from me but hopefully will help... Please keep the suggestions coming and I'll try to keep the site evolving, I'm re-wring the poultrykeeper.com site at the moment (due for launch in April) and after that will look at the blog and forum to see if there are improvements we can make.
Tim ;-)