[KaiserPro]

Lets split this into three:

1)ingesting for the purpose of crowdsourcing street view imagery

If they are doing that(Which I strongly suggest they are not, well at least not yet), then having multiple views allows google to remove things that move (people/cars)

2) Depending on how they do this, if its using "visual landmarks" then people are a massive pain. They move, and cause all sorts of problems when doing positioning. So they'll need to be removed for the system to work properly.

3) The actual scary part is not the faces, persay. Its the fact that any picture where google has streetview is now able to be precisely located, regardless of who, when or how it was taken.