I doubt it. But there are some for which no more caution is needed than could be taken largely for granted with an intelligent bunch of people like the readership of Less Wrong, and some that aren't very approachable by anyone who isn't quite expert already. There's no need to say "exercise caution" about those. It appears that Kiyosaki's book is very approachable and may be very unreliable. That's an especially dangerous combination, if true.