Whats somethong witty to say to this bad friend?

[Laura]

my family moved from canada to australia a few years ago. my best friend when we left was malanie. her sister and my sister were also best friends. melabies sister posted somthing on facebook about australia, and melanie commented "australia is for trolls and losers" whats somethibg good i can say to her to make her see what a b***h she is?

[Brandon]

It takes one to know one.

[Rebecca]

call her out on being a b****...say something like "only bitches like you think that way"