Comments policy

I've never had to do this before, and I'm gutted to have to do it now, but here it is. Some new rules:

1. Comments which I judge to be irrelevant to the post to which they are attached will be deleted. No exceptions.

2. Comments which I judge to impolite or offensive may be deleted without warning. That's my call.

3. Comments complaining about these rules will be deleted. No exceptions. My blog, my rules.

4. Commenters whom I judge to be persistently breaking these rules henceforth will be barred permanently.