Default Profile for new devices in Smart Home Manager

I like having the ability to set schedules for Internet access to different profiles using the Smart Home Manager but there needs to be a "default" profile which any newly connected device can be put into for this to be truly useful. If a child's friend comes over with his phone/tablet (or for the smarter kids out there who know how to update their device's MAC address), the newly connected device has unrestricted access until I pro-actively sweep the network and assign it to my child's profile; rendering the feature virtually useless.  I'd much rather a feature where I can assign my devices that I approve to an "unrestricted" profile and any newly connected devices are locked down.