I've never heard the term 'residential proxy' before, but it seems like a Tailscale exit node would qualify for example? This doesn't seem necessarily malicious or even inadvertently dangerous to me?
Generally not really. Residential proxies are services that can provide customers with the ability to send and receive traffic from a wide range of apparently legitimate networks (i.e. people's home internet connections). Almost always this is done without the informed consent of the person who owns the device that is used as a proxy, whether it be buried in some agreement somewhere or just outright malware.
The biggest danger is that said proxies can also allow access to internal networks, and as you might guess from how they are installed, are not usually operated by the most scrupulous of organizations.
It's pretty much exactly a Tailscale exit node, just one that somebody else installed without your knowledge or consent.
it’s a well known term in shady markets of the internet, they allow users and abusers to bypass bans and create multiple accounts that cannot be linked with each other by networking intel
Residential IP addresses tend to have better reputations than datacenter networks, so there are providers who sell access to home internet connections. Oftentimes the people running the proxies have no idea they're running on their network, they're quasi malicious.
https://cloud.google.com/blog/topics/threat-intelligence/goo...