One of the most surprising, and unknown, sections of the BC Motor Vehicle Act is the one that says you must yield to oncoming traffic that is signalling a left turn.

"174  When a vehicle is in an intersection and its driver intends to turn left, the driver must yield the right of way to traffic approaching from the opposite direction that is in the intersection or so close as to constitute an immediate hazard, but having yielded and given a signal as required by sections 171 and 172, the driver may turn the vehicle to the left, and traffic approaching the intersection from the opposite direction must yield the right of way to the vehicle making the left turn."

Note the last part "traffic approaching the intersection from the opposite direction must yield the right of way to the vehicle making the left turn". Nobody in BC except traffic cops and personal lawyers knows that requirement exists, and NOBODY obeys it.