Opt in and opt out

Every year, tens of thousands of people die because organ donor status in the US is opt in. If you want to be an organ donor when you're dead, you need to go through steps now to opt in. The default is "no."

Press releases, send by the billions, seem to have become opt out. If you don't want the barrage of nonsense, PR firms appear to believe that one by one you must alert each and every publicist in the world of your desire to not hear from them.

401 (k) plans tend to be opt in. If you do...