I have been visiting bitcointalk for like 9 months now, and haven't read that before. Shame on me!
BTW, I see trolling posts, "hold hold hold" posts, uninteresting threads and ref spam posts frequently.
And I have found a few threads with [NSFW] tag in the title lol.
It's recommended if you do think a thread/post is inappropriate or not following the guidelines then you should report it, the moderators will then decide that for themselves and will make a decision. Just remember that because you report a thread which isn't following the recommended guidelines doesn't mean the moderator will agree with you. The moderators to my knowledge do not follow any strict policies and take their own initiative.
I'm not 100% sure on the "[NSFW]" tags. But, it seems that it's now acceptable to have those types of threads as long as there is a tag within the title.
Edit: Thanks, mprep for clearing that up.