The domain “MartinLutherKing.org” is owned by the white supremacist group Stormfront.
www.milk.com is not owned by anyone in the dairy industry and is just one man posting random links and bits of prose. He refuses to sell it for less than $10000000.
Nissan.com is not owned by the car company, but by a single guy named Uzi Nissan. He has been fighting the car company in court since 1999.
The longest-running legal battle for a domain name is believed to be the fight for PETA.org. People for the Ethical Treatment of Animals sued People Eating Tasty Animals to obtain the name – the case spanned from 1995 to 2001.
McDonald’s didn’t register “McDonalds.com” and had to donate to a school to get the domain from the Wired magazine writer who registered it in 1994.