Tony I think I might not have made my points clear enough - my mistake, sorry:
1)  The book contains some useful information.
2)  Just because one person suspects a fraud does not make a person fraudulent - constitutional right of innocent until proven guilty?
3)  RK made me realize some things about real estate that were essential to my change from a "poor" to a "rich" mentality.
4)  I am not a RK groupie, I only bought one book (Cashflow Quadrant), the others were given or loaned to me.
5)  It is very possible he is not up to your standards in moral behavior.  I dont know exactly what your standards are, I only know mine.
Let me talk about his cash flow quadrant just for a minute.  This was a great enlightenment for me, although it seems sort of "Duh" now.
All cash flows in to people in basically four ways:
E - Employee pay
S - Self Employment fees
C - Company or Corporate Income
I - Investment Income
The quadrant looks like this:
Active   Passive
E        |      C
--------------
S        |       I
His #'s were interesting:  90% of people make their money on the "Active" side, yet 90% of the wealth is on the "Passive" side.
Amway/Quixtar people jumped on this idea to show the plusses of residual income, so yes, that's where they came in, although I understand he was not involved with them until after he wrote the book.
Active income = you work, you get paid.  You stop work, you don't get paid
Passive income = you get paid either way.
All of us need passive income!
I've found ways to get passive income besides an MLM scheme.  There are ways to do it:
Commissions
Royalties
Tax free Bonds
Growth and Income stocks (Income meaning they pay a dividend)
Duplication of effort (a big one there! Hiring people to work for you.)
All of it involves risk.  Some of it is pretty risky, but I have been managing my risks as carefully as I know how.
I decided that I had tried "poor" and now I wanted to try "rich" - reminds me of something Marlene Dietrich said in one of her rare interviews:
"I've been rich and I've been poor.  Rich is better."