I usually don't let eggs go to anyone that are beyond 10 days or less.  I never wash the eggs I bring in, but I do refrigerate them right away.  Everyone who gets eggs from me is told to be sure to wash them before using them.  I have a little handout that goes to "new eggs"  in which I explain briefly about the bloom and how important it is, and I come right out and caution them that occasionally they may find a blood or meat spot in an egg.  I explain what that is, what they can choose to do with it, (ignore it, remove it, or just not use it) but ask them to let me know - if I'm getting eggs that consistently have such spots I want to know so I can keep an eye on what's happening with the girls.  
 
I don't do anything fancy with the eggs.  I do use a plain old pencil to write the date on the egg as it comes into the house.  Comes off when the eggs are washed.  Older eggs I hard cook and feed back to the chickens, crushed up shells and all.  That way I don't accidentally give an older carton out, have someone open it and see a month old date on the eggs!  Harder to fix a bad reputation than it is to build a good one.