It's a reasonable thing to worry about. Bad actors exist. IP is valuable. Computers are insecure. People are lazy. You have to be careful out there.

> I don't trust new developers to make that determination.

Ignoring this issue is a sign of professional immaturity. Recommend you view it as an opportunity to educate the younger members of your team. Show them the power of a solid CLI toolbox that respects your privacy while delivering solid performance.

Still, you shouldn't be dogmatic about it. Webapp tools can be useful for understanding a new programming language or API. Just be judicious.