Adding stuff to the right side of you bike may well discourage cars from passing too close.
However as the years have progressed, I have taken a far more safety for me approach to cycling.
In a lot of roads in my area, when in paricular there are cars parked on both sides of the road, it just not safe (for me) to leave enough space so that a car might try to sneak past (at speed) if I were cycling close to the left side.
So I block the lane, cycle in the middle. There is often no choice.
What has helped a lot is that in my urban area, Wales, the speed limit in urban areas defaults to 20mph, so me 'blocking' a lane at 15mph, is not much of an issue.
However as the years have progressed, I have taken a far more safety for me approach to cycling.
In a lot of roads in my area, when in paricular there are cars parked on both sides of the road, it just not safe (for me) to leave enough space so that a car might try to sneak past (at speed) if I were cycling close to the left side.
So I block the lane, cycle in the middle. There is often no choice.
What has helped a lot is that in my urban area, Wales, the speed limit in urban areas defaults to 20mph, so me 'blocking' a lane at 15mph, is not much of an issue.