Robert's feedback
The idea behind the subject-line prohibition of commonly acknowledged "swear words" is that some people access the Zone from public places which may or may not have TOS agreements or perhaps filters restricting access to sites using that vocabulary. So, to protect those people's access, posters are asked not to include such words in their subject lines.
Direct posting of images that might be considered a problem for either violence or sexual content is subject to the same restriction. A link to the image, with a warning, is preferred.
Regards--
Mary Anne