Here’s one more reason why your business should monitor social media. Musician Dave Carroll watched in horror from his plane window while luggage guys on the tarmac broke his $3,500 guitar. So he posted a musical to YouTube yesterday spilling the beans on United; the video already has 15,000 views and is trending fast. The most interesting stat: the YouTube video has spawned 950 comments, most with similar angry stories about airlines customer service. As Darryl Ohrt notes, this is not the kind of viral any business plans for.