I'm certainly of the belief that a standard will help in simplifying the identification of features and comparison of images. I don't think it should be compulsory, but rather an (to use the politically correct terminology
) advisory standard.
Man I sound just like a bureaucrat.
I also think each image would benefit from a UT timestamp. This is already done by some posters, but it may not have occured to those new to the imaging game how useful timestamps can be.