Since the update (which was GREAT for the crashes) I've not been attacked by raiders once. My vault is is maxed out, and my dwellers have more power/food/water then they'll ever use. Nobody has less then a pwr 8 weapon, and pwr 5 suit. I reinforced my vault door to the max, and given everybody in that vicinity the strongest weapon as I can, but the Raiders never come. On a sidenote it would be really cool if they drop the loot after I kill them, if they ever come back. Also it would be AWESOME if you let the radio station play things like 3 dog and Daring Dashwood and his ghoul companion Argile (maybe a little Enclave radio.... Hmmm)