Yes, I did it on my own network at the router level as a proof-of-concept. I didn't actually use it on other people, but the idea is that a malicious public net

Yes, I did it on my own network at the router level as a proof-of-concept. I didn't actually use it on other people, but the idea is that a malicious public network operator could do so and effectively install keyloggers on dozens of people per day.