They can always create an "ask mint" site. Plus we are all here because we use "Ubuntu", There was Once a question I was working on that the user did not say what version Ubuntu he was using, turns out he wasn't using ubnutu at all, and the accepted "Patch" or workaround failed simply because of small differences in folder structure. Plus If we let one, we would need to change the "Ubuntu" part of the logo to "All Debian based linux"
Ubuntu ≠ Mint
Maybe some think that is mean is some way, but it is just practical, not everyone can run more than one version on linux on their computer, 4-5 derivatives of ubuntu and debian from which ubuntu is based.