I read somewhere that drivers can be persuaded to give more room this way - because they see something sticking out that might scrape the paintwork on their cars... Presumably, for some reason they don't think that impacts with cyclists or the bikes will damage their paintwork, and they don't care about anybody else?
I tried an experiment, but I don't recommend that
you do it in case it doesn't work for you and some fool hits you!
I worked on the assumption that drivers were judging what they thought was a safe distance to leave when overtaking me based on how they assessed my riding as they approached me. I did a few rides keeping an absolutely steady distance from the kerb. I had several close passes. On my next few rides, I introduced some slow random variations of about +/- 0.5 metres in my distance to the kerb as cars got closer. The overtakes were MUCH safer - even when I was furthest out into the road. I was fairly sure that the drivers thought that I was an unpredictable idiot who could not be trusted to keep out of their way, so they kept out of my way instead! (I'm not talking about me swerving in front of them,
just gentle meandering well before they got within range.)