I usually refuse to attend any funerals (even those of relatives and friends) because I regard them as completely pointless. My will states:
"I desire that my body be cremated without ceremony and that my ashes be disposed of, also without ceremony, in any convenient refuse receptacle."
I attended my mother's funeral only because it seemed simpler to do so than to argue with family members about my failure to do so. I attended my father's funeral solely because I was paying for it. The only other funeral I've attended was that of an aunt, where I thought that it would be nice to see my cousins again.