I love family fueds. They are really easy to get into, as has already been said, and almost impossible to fuck up booking wise as the history is their to be tweaked.
Wasn't Rowdy Roddy Piper once said to be Bret Hart's cousin when they were fueding over the IC title? And I'm pretty certain Jim Neidhart was said to be Bret's cousin back in the day to, although I don't think they ever had a fued.
And how about Eddie Guerrero vs. Rey Mysterio in the fued over custody of Dominic, Rey's son. Eddie revealed he was Dominic's "papi" and the real-life friends had a pretty long and intense fued over the whole thing if I remember correctly... I'd say that counts as a family fued to.
...and the rules don't apply to me, brother. 
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