I have been reading Kathy Sierra's "Creating Passionate Users" blog for a while now and have always enjoyed their unique and insightful content. Recently Kathy was threatened by some people who I hope are simply harmless, immature, misogynistic losers who think they're being funny (they're not). Needless to say the anonymity of the Web allows them to remain unknown and to this point, unfound.
In the meantime Kathy has understandably cancelled speaking engagements and remained locked in her home since there's no way for her to know how real these threats against her are. You can read the whole story on her blog, which has (hopefully) temporarily been put on hold.
I hope these idiots are found and charged appropriately for threatening Kathy's life. This kind of behavior should never be tolerated.