United Airlines either sells or gives email addresses of it's customers to spammers. How do I know this? I am getting spam at an email address I created solely for the purpose of giving to United Airlines. It's never been given to anyone else, ever.
I guess since their bankruptcy, they've stooped to really cheap moneymaking tactics liking selling email lists. Well, I hope they made a lot of money on the sale of my address... because I won't be buying any fucking airline tickets from them now.
So, in closing: Fuck you, United Airlines. I hope you die and rot in that special level of hell reserved for telemarketers and spammers.