Yes, there are ethical concerns when using residential proxies. The primary concern is how the IPs are sourced. If providers obtain residential IPs without the consent of the homeowners or internet service providers (ISPs), this could be considered unethical. Additionally, the use of residential proxies to scrape data, conduct fraud, or bypass security measures (like CAPTCHA or rate-l... http://blog.piguse.com/blog/network-basics/selection-and-configuration