I am one of those people who believes that vindictive behaviour is never ok, even in defense.  Some people admire that as grace; others deride it as being a doormat.  Alice Hoffman is in the latter camp.
As a writer you have to expect bad reviews.  You don’t have to like them; you can rant and rave about the reviewer to your friends and family about the injustice of it all; you can even, perhaps, write an angry post or tweet to your fans.
You can not, however, express your hatred of …