Lex's version:
"Not only are your arrogant assumptions about my work false, but you have used Amazon.com as a urinal to publish slander."
As attractive as the word "urinal" is, I don't think it's the real point of the sentence. I would let the reader hear "slander" or "lies" last, since that's the real incendiary bomb she's trying to drop. But perhaps my version compromises her voice too much, as Ms. Rice contends no editor should. Maybe it sounds too much like me talking. Oh well. I'm content to let her ramble on in any case. (what do I know? My writing hasn't sold a penny .... yet) I love how outspoken she is.