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by tptacek 3762 days ago
There is no modern OS on which you can sniff loopback without privileges.
1 comments

Right, but it looks like the process listening on the port is running as the user.... what is to stop another process running as the same user from killing that process and then binding to the same port?
Nothing, but if you own the user's account, you also have their /Library directory to play with.