"I have read the plan(as have many others), I know how the rates are figured"
Actually you seem to illustrate otherwise and merely show your bias.
The FairTax is described both as tax inclusive and tax exclusive and the resulting sales tax can be described - or calculated - either way. And that's an indicator of the extent of your knowledge or lack thereof.
"You assume that everyone that points out flaws in the plan is stupid and don't understand it. "
No comment required.
"... the plan may be flawed and needs to go back to the drawing board ..."
Perhaps yes, perhaps no - but no one has been able to conclusively show that ... nor have you.
"Why don't you start a thread asking for opinion on flaws in the plan and advice on making it better? "
Uhhh - actually that seems to be what your were trying to do but it hasn't been too "constructive".