Google has started to index these pages on my board, so I think it would be a good move to make them nofollow by default. It's disabled now, but during development I had to keep it on.
I did that first, but it's not that practical when you're with a laptop on the go. I use your add-on right now (haven't seen it first), so it's much better turning it on/off - thanks for that. We also made a condition to show the debug mode just for admins, but it's still running for everybody..