If I found out a junior dev had been copying copy-left or proprietary code then I'd have to rip out that code, have a chat with them and figure out what to do f

If I found out a junior dev had been copying copy-left or proprietary code then I'd have to rip out that code, have a chat with them and figure out what to do from there. Even if the code isn't copy-left it's still someone else's code, sometimes that's ok but sometimes it's definitely not.