In the 75000 or so miles on my touring bike I dumped the chain off the front and it came off the back into the spokes in back. I had recently overhauled the hub and didn't put the SPOPKE PROTECTOR back on. A spoke broke and when I began the repair I found 8 more that were cut and ready for failure.
I ride with a handlebar bag and a Carradice saddle bag, so I guess that I'm a dork who doesn't break spokes.