This site refuses to collect e-mail without permission.

A person who collects, sells, distributes, or uses e-mails without permission using technical devices shall be fined up to 10 million won pursuant to Article 50-2 of the Act on Promotion of Information and Communication Network Utilization and Information Protection, etc.

Article 50-2 of the Information and Communication Network Act (prohibition of unauthorized collection of e-mail addresses)

No one shall collect e-mail addresses using programs or other technical devices that automatically collect e-mail addresses on the Internet homepage where the intention to refuse to collect e-mail addresses is specified.
② No person shall sell or distribute e-mail addresses collected in violation of the provisions of paragraph (1) ③ No person shall know that the e-mail address is prohibited from being collected, sold and distributed pursuant to paragraphs (1) and (2), and shall not use it for the transmission of information.