Originally Posted by vurt 
Best example throughout the years must be Monster Cable who sued to left and right anything that had "Monster" in its title. I mean wtf!?
Monster got its ass handed to it at least once, when they went after a small company called Blue Jeans Cable. It turned out that the company owner had a previous two-decade career as a lawyer and he let them have it in classic form. Monster was expecting a cakewalk and they ran into a buzzsaw.
The relevant documents are online and worth a read. Sometimes the good guys win.
http://www.bluejeanscable.com/legal/mcp/index.htm