I don't mind off-topic posts. I sincerely can't see how they're harmful.
Indeed, I'm about to encourage them. This post has no topic. All comments are therefore offtopic. Post anyway!
All comments are emailed to me, so I don't miss any.
RSS feeds are the reason I don't see any necessity to post regularly, though I will perhaps make the attempt at some point.
I can be a selfish bastard. I'd prefer not to post my email, but you can ask me to email you and I will. Spam filters are pretty good these days...but the best spam filter is just not to have a public email. On the other hand I can easily post and then delete my email, and then nobody has to have it out there publicly (for long).
I wonder if there's anyone who knows in detail the pros and cons of posting their email. It seems to just be the thing to do, without any thought either way.