That's great until your device is weaponised against others (see: open HTTP proxies, open DNS resolvers, open SMTP servers, several billion IoT devices, and countless other examples)
Exactly, which is why we shouldn’t be allowing user “software installs” on any device, not just phones. The world would be a lot better if all tech were fully locked down, “freedom” be damned.
Those issues could be diminished if ISPs actually handled abuse requests and shut down people's connections until they removed their malware.