The rules of the Death Note, such as the restriction that the user must know the face of the person they want to write the name of and the limited space for details, create moral dilemmas for its users by forcing them to carefully consider the consequences of their actions. Additionally, the rule that the user must envision the victim's face as they write their name adds a personal and emotional aspect to the act of taking someone's life, which can weigh heavily on the user's conscience. Overall, these rules make the use of the Death Note a complex and morally challenging decision for its users.