Being a non-moderated group, the off-topic posts in rec.boats will never
stop.
That being said, I believe that-

1- All off topic posters should show enough respect to always preface their
posts with "OT" and to always post with the same ID.

2- The subscribers of this group who are unhappy because some
topics/posts/posters offend them, or don't fit *their* vision of how
rec.boats should be, should take the initiative themselves and configure
their newsreaders accordingly. This group can look anyway you want it to.

Also, I find it quite hilarious how most of the "Good bye cruel world, I
can't take it anymore" type posts complaining about the off-topic posts are
some of the worst offenders. I don't block anyone, or any topic, but I am
thinking of blocking posts containing "Obit: rec.boats", RIP.boats", "I'm
outa here", "what does this have to do with boats" etc, etc, etc.