Something that I came across today, that for lack of a better description, just flat out pissed me off.
I was booking a hotel room on hotels.com, and found some interesting pricing disparaty when I logged into my hotels.com account on another computer.
Initially I had searched for available hotels, and found one for $145.
I logged into my account in a separate browser, and low and behold, the price went up to $220.
Tried from another computer and same result.
I could add the hotel to my cart and then login and the price would remain the same.
So basically Hotels.com sticks it to their repeat customers and deliberately delivers them a higher price than someone that just happens to browse their site.