Google Instant Upload’s Nag:
“Make That Photo Public”

Apparently, this has been loudly complained about from at least Aug. 27, 2011 through as late as Sep. 15, 2013:

http://productforums.google.com/forum/#!topic/google-plus-discuss/JolYBcJmzWs

The successor function.
g + 1 = S(g)

Edit:

In Canada, it turns out that we even own photos we took for someone else.

Why you want to mess with my photos, Google?