Certain outstations are terrible for this. Particularly in Glasgow during the summer crowds. EDI was very diligent, as is LHR. Sydney can be very hit and miss but I’ve never had a tag ripped off.

FWIW GLA still use hand baggage F tags both for your carry on but also as the red F tag for checked.

Also, every time I’ve been flown a mixed fare (as a Gold) that started in F and connected to J, I’ve had my bags delivered with F tags on with the other F luggage.