Letting small cars squeeze between 2 other small cars that happen to currently be on opposite sides of their adjacent lanes might help too. Ignoring speed limits, lights, signs; tailgating; ramming people off the road; all great ways to reduce traffic.
Hmm, I don't think the slippery slope argument works here. There is evidence to support motorcycle filtering works, there is not evidence to support small car filtering, ignoring lights, ignoring signs, tailgating, or ramming people off the road works.
There is evidence that removing speed limits works though, so not a total loss!
https://www.wired.com/2015/06/yes-california-let-motorcycles...