1. Do not post photos containing material that some people may define as "disturbing" or "inappropriate". This includes, but it's not limited to, nudity (feel free to PM a mod if you want to make sure your photo is OK)
2. Avoid posting photos in full-resolution. The maximum allowed image width is 900 pixels. Quick suggestion: combine url and img tags to allow users to click on the thumbnail and view the full-res photo if they desire to.
3. You must have copyright on the content that you post.
Infraction of the aformentioned rules may result in sanctions that range from a friendly warning up to temporary account bans.