...I've read many a post about BOBs and have wondered. Is a BOB really, I mean REALLY, neccessary? I can put one together, but will it be worth it? Putting one together and just waiting, only to replace the certain items that expire, seems kind of a waste of time. I can see using a cheap backpack and such to put this together, but spending a lot of money on stuff you prolly won't need or use seems wasteful to me. Someone educate me, please.