You do not want to cross Bethenny Frankel on Twitter.
Already dealing with an ugly divorce and custody battle, the former Real Housewife went off on a hater yesterday, responding to some serious vitriol with a bit of her own.
"cupcake decorating w bryn at dc cupcakes & now girls' lunch," Frankel Tweeted harmlessly. "It's crazy to be able to spend a real girls' day w the peanut. #fliesby"
In response, some moron fired back: