Hmm, I wish I could say I have had the same luck. I have gotten to generation 3 before, right before the power went out. When the lights were back on I was looking at an empty lot with the people I started out with ages ago. I ended up just restarting and have never been too succesful with getting to the third generation, my sims like fire and keep burning themselves and the nice houses I put them in.
That's just it though, none of my Sims have died of starvation, though I know the ghosts who do die that way steal from the fridge. I have one branch of the family living in that big town/city house, the one with the garage attached and the big 'entertainment room' on the ground floor (I just use it to store Aspiration awards and other bits of junk ). All the Sims in the family so far have died of old age. I have the fridge near the door that leads from the balcony, and I can almost guarantee it will get raided at some point when the ghosts decide to pop out for the night... It just struck me as weird for a 'normal' ghost to steal food. Oh well, they have plenty of money...