Since I am the administrator of the website and the librarian of data, I get the final say as to what form this gets added in, how it gets named and where it gets stored. Someone has to set standards and that is what librarians do.
This has far reaching impact not just on picture names but on the quality of sources, the verbage used in citations and how notes are used. Yes it means a lot of work for me fixing things up and making them look right but in the end I am contributing the largest amount of time and energy to this project.
On the other hand when I provide information as a service to clients, I advise them on how they could do it, however they don't have to take my advice, they can name things any way they want and keep their sources in any form they want (or for that matter keep no sources).