It happens, but it's definitely not the norm. A key to helping employees self-select for telecommuting is to encourage them to think about their own self-discipline and habits, and decide for themselves if frequent trips to the refrigerator might be a problem. This self-discipline issue extends to other household temptations as well - ranging from the ones most people want to limit or avoid (e.g., smoking, alcohol) to the ones that are more benign but can still be problems if overdone (e.g., the television, the exercise equipment, the hobbies). The biggest risk is using any of these as escapes when it's hard to get down to work. It hasn't been proven that attacking a pile of cookies will add to anyone's motivation.