i see your concerns, Moirakathleen. It would have to be rolled out along the same lines as IMs insofar as you would have to option to ban the caller. SL friendship would also be a prerequisite of such a development, too. Each session would have to be on a request-accept basis just like teleports, objects or photos, etc. Think it would also have to be reciprocal rather than one-way so it can't be used simply for surveillance. Generally, all technologies have down-sides as well as up-sides that have to weighed up. Right now, SL seems to be falling behind RL in this respect. People routinely take movies on their phones and share them with partners and on social media instantly. In SL, if my partner wants to share something they're looking at or attending in SL the only option is a static snap-shot.
i'm not asking for the sorts of desktop-to-desktop "handshake" that services like teamviewer offer. I can see why LL would stay clear of that because it's a minefield of unforeseen consequences. However, residents are already doing this (in pursuit of the erotic attractions of controlling and being controlled) and all of it is completely beyond LL's platform, supervision and privacy standards. Why not offer residents a safer and less hazardous way of sharing inside SL where protocols and permissions are built into service? At least that way, it all stays inside SL and, if things turn sour, we call shut it down.
Your concerns are appreciated....