Sammiches, if done right, are not gross when packed for lunch - even when made the night before. Spaghettios (and related canned goods) require a can opener and a bowl - both easily tossed in a bag the night before. If you're in an office 10-2, chances are good there's a microwave nearby. Leftovers from last night's dinner are great lunches. You can also grab something pre-made from a convenience store on the way in (yes, this does require 5 extra minutes).
It's not mean when you have a better setup than most people get.