Also, to come back to my objection to this:
Harry is a lightning rod and he owes it to everyone around him to explain the danger of standing near him in lightning storms.
I've figured out why I object to it. My problem is two-fold:
1) First, that it claims that Harry is the reason for all the nasty stuff happening around him. Whether Harry were around or not, the problems of Storm Front, Fool Moon, Summer Knight, Death Masks, part of Blood Rites, Dead Beat (probably), possibly Proven Guilty (depending on what people's motivations were--we just don't know yet), Turn Coat (although it wouldn't have happened in Chicago), and possibly Cold Days, would still have happened. And most of them would have happened in the same place. So how is
Harry considered responsible for bringing down all that trouble onto people?
2)"Everyone around him" is too broad a category. Harry does not owe it to the entire city of Chicago to tell them about the supernatural world. You could as easily claim that Harry owes it to everyone around him to go live as a hermit and never get close to anyone, because trouble might find him and hurt those around him. It's just unreasonable.
If you'd said, "Harry owes it to
those he involves in his fights/cases to explain the dangers," I would agree with you.
@Morris: I always took the last sentence of that quote to be about the political situation more than the "how dangerous some entities are" side of it. I also think Billy knows more than Dresden thinks Billy knows, or at least he did in the earlier books.
I tend to agree with this.
Use a scale for threat level. I know people always make fun of things like the terror alert level colors or the DragonBallZ thing where they have the power reader "it's over 9,000!" stuff, but a shorthand for how bad is the monster/how bad is the situation is probably a really good idea.
This would probably work, except that I tend to think that Harry was too catatonic to be expected to remember it in order to tell Will at the time. Other people may interpret his level of non-functionality differently, however.