RJ was a physicist and fleshed out magic massively in this series but I don't think he went so far. He basically wanted teleportation to occur in the series and made it so. It's too difficult to think of every issue regarding these topics.

I once asked what would happen if you were tied up in the real world, dreamed yourself into TAR and then opened a gateway there. Could you exit the gateway and untie yourself? Unlikely. But I doubt he thought of that.