Update: On second thought, this is not a good idea, because one can see the content without confirmation if they view that reply directly from RAT or Super Search etc.

If you really want to tag your own post as NSFW, try 

<readmore title="NSFW">
...
</readmore>

[download]

Let's see an example of what it really looks like.

Some dirty content.

In reply to Re^2: Not Safe For Work threads by ambrus
in thread Not Safe For Work threads [NSFW] by Argel

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