Beyond the somewhat detailed response to kiddarko below, i wanted to reply to the tag-order thing.
im not a developer or anything, so i don't know why tags work the way they do, but i think its pretty common knowledge about NSFW appearing in the first tag in order for the system to filter it.
I also don't think its necessarily bad that the NSFW tag as the first tag hides posts from feeds, but as a later tag does not.
At least to my way of thinking, if the NSFW aspect is the primary aspect of the post, the tag should be first and it ought to be hidden from the feeds. If the post is about something else, and there is a small aspect that is NSFW (an example might be some of sean kings old posts), then i think the tag as a warning is sufficient without hiding it from feeds.
WHere to draw that line is problematic, and subjective to a certain extent. To me, this seems to be primarily porn and the photography aspect is secondary. But i am not an expert on either subject.