Originally Posted by CommuterRun
I carry a weeks worth in at a time in my panniers, or on the trailer if it's too much to fit. For cold stuff I could carry an ice-chest on the trailer, but I normally don't. My work commute is not that long.
A long time ago I worked at a place that had a lunch thief. Until someone placed a big, human feces burrito in the refrigerator. No doubt who the thief was after that. He was the guy out back washing his mouth out with a hose for an hour.
I did similar to a lunch thief by making a sandwich out of canned dog food, then when I noticed it gone, putting a note on the 'fridge with a photo of where the "meat" came from, and a warning that it will get worse from there.
Never had an issue after that, but I ended up finding a better place to work in a couple months after that, and started just eating out all the time.