A large e$-$commerce company is collecting and analyzing user data for targeted marketing using data mining techniques. The company is also concerned about the security of its database and the privacy implications for its users.

$($i$)$ Discuss the ethical and legal aspects of privacy in computing, especially in the context of data mining and user data collection.

$($ii$)$ Propose privacy$-$enhancing measures that the company can implement to protect user data, ensuring compliance with privacy regulations and maintaining user trust.