Reasons people honk:

  • It's trash day and the truck is blocking the street
  • An uber has parked in the bus stop
  • There's a five-block traffic jam ahead
  • Friendly greeting to acquaintances*

Desired effects:

  • The offending vehicle[s] move

Actual effects:

  • None
  • The garbage men take longer 

* This honking is effective. 

Note: maybe this page should be rewritten as a table sorted by effectiveness / outcomes.