[throwaway049]

Contrast with the UK where 'filtering' is legal [0] and I have never heard anything negative about it. Riders filtering won't cause me as a driver any delay.

[0] Rule 88: https://www.gov.uk/guidance/the-highway-code/rules-for-motor...

[manarth]

Not just legal, but recommended.

You can fail your motorcycle test for not filtering when appropriate.