iTunes sync management
Right now what I'm doing is emailing each photo to myself, that way I have the actual photo file in a non-locked-down format, and then syncing the iPhone to a new computer with 0 photos to clear the previous sync.

I find this restriction from Apple rather backwards logic and not very user friendly. Why lock down photos? They aren't copyrighted MP3 files or MP4 files, they are photos that I personally took, and the fact that I can just email them to myself to create new copies of the file shows that this security lock down isn't secure at all. Disappointed with the decision makers on this one.