)
Anon users can open reports on both this site and FurBooru - just go to that site, and open a report there just exactly as you would here (except you might get asked to pass a captcha).
And as you are one of the people involved please describe in the report why the image is breaking Rule #0 and that certainly will make the images more actionable.
So, please report them on FurBooru. That would be very helpful.
PS: I've looked again for those images here and can't find them, so it seems to not be a problem here. If I'm missing something, please report it here, too.