I considered the posting of that photo to be inappropriate by virtue of the
high standards that Christians should hold themselves to -- not nearly so much because of the content of the image itself - but, rather - because of the 'common-decency' / 'privacy' / 'respect' issues that are connected with it.
Sometimes, the
idea behind a picture can be "worse" than the image itself. For example, it is possible for a photo -
having no nudity at all, but being "highly suggestive" in some way - to be
more inappropriate than a different photo that may actually "show more skin"...
Sometimes, what a picture "suggests" is not something we should encourage ourselves or others to ponder.
Sometimes, the "subject matter" of a picture is not something we should be nonchalant about.
Merely taking a picture in a "privacy area" - such as a restroom - demonstrates a breach of respect for the privacy of others. Posting it on the internet makes it worse. Posting it on CC makes it even worse than that. Depending on the situation and circumstances - it might even be considered by some to be
criminal behavior.
How does 'The Golden Rule' fit into this scenario?
A wise man considers the ramifications of his actions before he acts.
A wise man strives continually to live "beyond reproach"...