I used to run supply chain tooling for a big manufacturing firm and, at one point, some dev got into a fight with a security-focused sysadmin somewhere who refu

I used to run supply chain tooling for a big manufacturing firm and, at one point, some dev got into a fight with a security-focused sysadmin somewhere who refused to allow the use of sftp for file transfer with trading partners (things like forecasts and order documents from suppliers)... so instead of either escalating or creating an alternative architecture, the dev unilaterally decided to leverage the fact that ports 20-21 were inadvertently open externally and use standard FTP for this. Nobody was fired and nobody really knew because it was an app supported by one person and as long as the business process didn't fail everything was "ok".