Want better service Just complain on Twitter

Public relations and customer satisfaction departments may not answer their phones if you call, or even know the right answer if they pick up, but they're often monitoring every word that goes out on Twitter.

After all, if you say something on Twitter about their product, you're saying it in public, and that can be embarrassing.

Source:
http://www.walletpop.com/blog/2009/10/09/want-better-service-just-complain-on-twitter/