Tom,
In particular, I think it was obvious that no offense was intended with the Canadian jokes, as a reply was made by a user who lives in Canada, and said "<font color=blue>That is a good one! Continuing in the spirit of good-fun....</font color=blue>" and he continued on to post a joke himself. Had there been comments posted about it being crude and offensive, of course I would consider removing it, but there weren't.
Threads like "Mr. Moron mired in muck" and the mailbox thread are actually related to rural living and tractors. True, not all off-topic posts are, though. Not everyone is interested to hear what is said in such threads, and I don't think anyone expects everyone to agree or find interesting what is said in the off-topic threads.
The fact is that while there is a bit of off-topic discussion, I think that has really helped the forum. We saw that users wanted to drift from time to time, so we made the rural living and off-topic forums. If you don't want to hear it, you simply don't have to read those forums. By organizing it into separate forums, we give you the choice. I have no doubts that there is still a sea of tractor knowledge exchanged on a regular basis in all of the on-topic forums. 24 of the 30 forums we have are directly related to tractors so yes, this
is a tractor forum. The only thing is, most people are friendly, and I'm happy to see that. It makes the forum quite a bit different from other forums on the web. Overall, there is a real (growing) community of people here who solve problems when they come up, help new users when they come along, and aren't afraid to sit back and laugh from time to time. Discussion doesn't have to be up-tight and emotionless to be effective.