You may have noticed a new 'Limit Viewing' option when submitting your pics; a few people have asked what that means.
Let's start with what it doesn't mean...
Adult, Pornogrphic or R-rated material is never OK on PZ, so don't even think about it! This is not what the 'Limit Viewing' option is about. We at PZ are of the opinion that Philippians 4:8 applies no matter how old you are.
What it is useful for...
PZ has a very diverse audience, and this can be used to limit general viewability of images that are relevant to more mature members but may be confusing or disturbing for younger members. Real examples we have seen of this are: Automobile crash photos (part of a great testimony), ultra-sound images, injured GIs, news pics of street uprisings on the foreign missions field, 'before' pictures of converts, etc.
When 'Limit Viewing' is applied, the picture will not appear in the main public gallery or on the user's profile page. It can only be seen from the member's gallery where is will be hidden by a warning suggesting you should be 18+ to view.
Please feel free to use this option as a tool for being more selective...also keeping in mind that PZ staff still holds the final approval power for all pics. 
Regards,
Cameron (PZ Moderator)
Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.