The rights to use a domain name are largely determined by the applicable trademark law (which can be difficult to ascertain because of the global nature of the Internet). Thus, even though you have validly registered a domain name, you do not necessarily have the right to use it in any way you choose. In most cases, your right to use the domain name is determined by trademark law, not the rules and regulations involved in the registration. For a further information, please see our section on domain name use.
The only real way to effectively protect a domain name is by registering a trademark.