I've turned anonymous comments back on again in the hope that the "trolls" will stay away and let the rest of us carry on sensible and civil conversations on this website.
But having no great faith that the handful of disruptive characters will exercise discretion, I've taken the precaution of switching-on comment moderation. It's rather tedious but for a short time at least. This gives me more powerful editorial control - not really what I want - in kicking out the troublemakers.
If it sounds like censorship the you'll have to trust me to use it fairly. No insults, personal attacks or spiteful comments please. By all means be critical and argue your corner and please sign your name.