"Camera Parent Lock" can be useful when rigging cameras, but it's not
intuitive, and has also generated a LOT of confusion. This is because
it breaks the fundamental parent <-> child relationship conventions in
Blender, and there is absolutely no indication that it's intended without
diving into the preferences.
I easily found 14 bug reports about this behavior on the tracker, which
probably means that thousands of people have been confused by this.
{T27459}
{T46107}
{T48821}
{T78607}
{T43055}
{T31881}
{T28803}
{T69048}
{T48656}
{T75543}
{T76436}
{T45790}
{T78934}
{T78607}
Even if we leave this preference on by default, there is no an indication
right next to the camera lock property, so any confused user can easily
find the problem.
**Before**
{F9000358}
**After**
{F9000387}
//Note that I adjusted the UI label from "Adjust Parent" to "Affect Parent"
after making this video.//