[lnanek2]

I used to run and code an image posting site. It took me all of half an hour to add a feature to the admin section that showed every frame of an animated image when posted using the image magick library from PHP. So this isn't a particularly difficult problem from a moderation perspective. Silent bans and contagious bans took a lot more coding (banning someone such that they don't know their posts are no longer visible, and banning someone automatically if they've posted a banned image or have a cookie from a pervious ban, etc..).

I hate APNG personally, though, because I think MNG makes a lot more sense. The server can return what is appropriate based on standard HTTP content negotiation with that. APNG is just a stupid hack and the only reason Mozilla went with it instead of MNG is because is saves 100KB in the browser binary, which I couldn't care less about.