Lindy West advocates calling out racist relatives on social networking sites:
Traditionally, it's been easy to laugh off bigoted relatives if you only have to see them once every few years. Those old-timey prejudices can seem almost like a wacky novelty act—and besides, it's more peaceful, and kinder to your mother, to just ignore them. But Facebook brings all that garbage hate-speech into your computer and into your bedroom and into your loved ones' faces. It would be totally unacceptable for anyone to call one of your friends a slur in your living room, and it is equally unacceptable on the internet. So Facebook forces your hand. If you ignore grandma's racist/homophobic bullshit you're complicit; if you delete it you're a coward.