The "QR code Wall" should be an optional way for verification!
The QR code verification prevents me of using the app. Please make me able to share my ID to connect with others via Internet. Take an example to Riots approach and make me able to verify people manually (screenshot below).
"it's a nice little app if you could actually add people over the internet" ~~ Kaffie from Zeronet
This QR thing is preventing other users too and will prevent Briar of getting widespread.