I'm sure many of us have been in the scenario the BMMF mentioned at a junction but rather than using the shield/shadow thingy you decide to be patient/safe and wait until your turn to pull out: drivers behind automatically assume you to be soft in the head or inherently weak as you're on a bike and aggressively pull around you as though you the cyclist are totally incapable of maneuvering out of the junction. This is why you must aim to enter/exit junctions centrally and not let yourself be bullied to the kerb.
I'm sure many of us have been in the scenario the BMMF mentioned at a junction but rather than using the shield/shadow thingy you decide to be patient/safe and wait until your turn to pull out: drivers behind automatically assume you to be soft in the head or inherently weak as you're on a bike and aggressively pull around you as though you the cyclist are totally incapable of maneuvering out of the junction. This is why you must aim to enter/exit junctions centrally and not let yourself be bullied to the kerb.