This fails for the same reason "stranger danger" fails; in order to get anything done, you must connect on a certain level. To use your analgoy, you could run

This fails for the same reason "stranger danger" fails; in order to get anything done, you must connect on a certain level. To use your analgoy, you could run a server entirely via port 22. But it can't host a webpage, run game servers, or do much of anything else if it only accepts SSH via 22. The process of socializing is kind of like vetting another server to see if you can trust them enough to use FTP or whatever. Sometimes, yeah, they screw with you; but not always. And the benefits once you do find someone trustworthy are greater than the chance of a bad actor. Now, whether or not one should trust coworkers, and how much, is a personal question. You gotta decide that on your own.