I was once in a small crash flying United. There was no major injury, but a lot of scare and a day of travel lost. United took good care of us, then I receive a 'sorry, here's $50 in credit' mail. I was stunned by how small the amount was.

A few weeks later a passenger created a Facebook group, and we all started to share our experience. United caught wind of it, and sent us $500 credit almost right away, with bigger apologies for the incident.