Message service limitations
At the moment, those who wish to use a Wisp, Projected_image, or a Goblin/Hin Messenger can use them to confirm if someone is online, and whilst one can pay the messenger services to not receive messages for a time, as far as I am aware there's no way to stop a project_image or wisp in a bottle from finding you, other than perhaps being stealthed.
This is an issue, because you end up with messages interrupting private RP moments, or even spy moments (as someone invisible can still get a messenger or projected image, which blows their cover), as well as it being able to interrupt scrying (when you send someone a tell of -project_image and they are scrying, it will appear to them and therefore their scry target will also see it)
Suggestion: Make it so that we are unable to send messages through these services if someone is under an effect that would block scrying such as the ESF: Ward ability or other FOIG method, or in a warded location, as well as if they pay for no messages for a time, or are stealthed appropriately, or if they are scrying.