To be fair, I'm not that upset over either. In the Armstrong case, expecting him to stop on a dime or re-enter at the point in the road he exited was unrealistic. In Froome's case, the 3 km rule basically nullifies any actions thereafter, since he got Mollena's time anyway. In both cases, any penalty likely takes the yellow jersey off a Patron for events somewhat beyond their control (moreso Armstrong than Froome).
EDIT: the better way to put it is, since they're both fairly similar circumstances that are clear penalties by the letter of the law, to see the same application under the spirit of the law allows for consistency. Neither pulled a Rosie Ruiz, and in fact gained no advantage over their positions prior to the crashes. When in doubt, unless there was a clear decision to gain advantage, just let it go.
