If you're Joel Spolsky you can release a piece of software with any name you care to choose and people will still take it seriously because you have earned the respect of your peers. Other people who don't have decades of experience producing exceptional software don't have the same luxury.

Fogbugz is a terrible name and if an unknown developer had released it there's a good chance too few people would have looked at it for it to get the necessary traction it needed to succeed. It really isn't an example of something people should follow.