The NSFW flag is a really good idea in my opinion. It's a compromise. It's like saying "we're still going to have content that might not go over well with all audiences, or all settings; but you just have to mark it as such so that someone ELSE that happens to see the screen doesn't have a shit fit." I feel like it protects me, as the viewer. If I want to look at a picture of a party of lemons, then I know that what I'm about to click might cause me to get a bunch of shit from my conservative co-worker. Maybe I'll wait for her to leave the room, and then I'll click the link about the party of lemons.