RP shout ads are obstructive to chat and gameplay

[TBerry]

Here's the thing:
Unless SE really cracks down on shouters, which I doubt will happen, and as long as the shouters keep it vague enough and only advertise as it as 18+ and make no explicit mention of what it is (something like "Adult venue" doesn't count as it's too vague), they technically don't break the ToS.
And as unsavory as it is, approaching and trying to recruit someone isn't either, unless they are persistent and don't take "no" for an answer. They may not have known, and simply deemed the character pretty enough or something.