Answer these questions:
Something that is not trademarked but still recognizable- like a catchphrase or a person\’s name, is it legal? Is it legal to grab up these domains? Is it ethical? What about changing the TLD (nasa.com for example, instead of nasa.gov)?
Suppose you purchase a domain name for your own use, and it turns out a company wants to buy it from you? Is it legal to sell it to them? At a profit?