Full Airplanes are no problem but Theater is forbidden in Europe 2021:

Europe: metro's in Netherlands and Belgium are without QR code but almost empty Bars are with QR...                           And this is SAFE?!?:

Christmas Market in Valkenburg Netherlands 2021:    Left is for everybody and Right is only when you've a QR code.  The virus can't jump fences Right?!? :

Virus doesn't move sideways: