Well, we can't sell any eggs with dirt/poop/dead chicken residue on them as Grade A in Canada, and now that is being extended to B and C. They (soon) can only be used as animal feed if they're unwashed. Sure, you don't usually eat the shell... but shell bits do sometimes get into food. Contamination can happen when you crack the egg, as well. Washing is just a normal egg station procedure in NA. I hope people wash theirs at home here, especially if they eat them raw.