Send a network site owner a message from within network admin?

HI

Is there a quick way to send a sub-site owner a message from the main network account?

Lets say someone signs up and publishes content that contravenes your TOS.

The only way to contact them seems to be to find their email address in their profile, copy it and send it via an external mail program?

Surely theres an option out there to click a link and send them a message as the network admin out there?

I looked at messaging plugins, like he ones you guys offer, but they are collaborative, I just want one that allows a network admin, to contact a specific user.