My on personal ban list.

Companies that I will never do business with:

• Facebook:  For numerous privacy invasions that even got the federal government involved.  No! Zuckerberg can kiss my ass!
• Instagram: For trying to pull a Facebook.  NO! And being part of Facebook doesn't help ether. 
  
• United/US Airways/Continental: For having a still-broken code share system. Gee, haven't fixed it in over six years now?