[garaetjjte]

>How do you propose that it differentiate between UIDs and user names?

Maybe follow GNU coreutils, prefix ids with + https://www.gnu.org/software/coreutils/manual/html_node/Disa...

[hahainternet]

I wasn't really asking for a suggestion, more pointing out that it isn't some previously solved and agreed upon issue.

It's something that has to be picked, and the parent poster will undoubtedly count as 'arrogance' for choosing a workaround.