Should I use a random domain I have for a lander? I mean, I don't even have to link the lander to my top level domain. Is this a bad idea? I could even use a sub domain. I should probably no follow all of my landers as well. These are only for PPC btw. Any sound advice would be appreciated. The domain I have is more like a technical domain.
ie.
whiteteeth.mydomain.com
ie.
whiteteeth.mydomain.com