Udpate: United Airlines has responded. Bottom line: YouTube complaint videos appear to work.
Instead of a complaint letter, the band "Sons of Maxwell" have posted a music video aimed at United Airlines over the destruction of one of their guitars on a trip last year:
[We] were traveling to Nebraska for a one-week tour and my Taylor guitar was witnessed being thrown by United Airlines baggage handlers in Chicago. I discovered later that the $3500 guitar was severely damaged. They didnt deny the experience occurred but for nine months the various people I communicated with put the responsibility for dealing with the damage on everyone other than themselves and finally said they would do nothing to compensate me for my loss. So I promised the last person to finally say no to compensation (Ms. Irlweg) that I would write and produce three songs about my experience with United Airlines and make videos for each to be viewed online by anyone in the world.United Breaks Guitars (YouTube, via Graham Linehan)
Boing Boing editor/partner and tech culture journalist Xeni Jardin hosts and produces Boing Boing's in-flight TV channel on Virgin America airlines (#10 on the dial), and writes about living with breast cancer. Diagnosed in 2011. @xeni on Twitter. email: email@example.com.