As you get older do you really ride more defensively because you want to, or do you compensate for failing mental functions?
I've found that even though I lane split I do it more slowly and give in and let others past. I do get a bit annoyed by the human cannonball arseholes that can't wait and swerve round you.
Why human cannonball? Without exception they wear helmets that look like they saw Dan Walsh from BiKE Magazine and copied the look without the riding and writing ability.
Maybe it is age, but I let them get on with it and hope to get home in one piece.