Force pinMode use

[SebCanet]

Hello,
I'm a technology teacher and I also teach workshops for beginners in programming, and apart from analogWrite, the other major problem is pinMode. This function is logical, rigorous and allows you to prepare your project, except that the documentation (which beginners cannot read in full) explains that it is not useful for the INPUT, the default state. And any 'exception' makes what you're doing less intuitive and can be discouraging.
So to help beginners, I think you should impose pinMode on both INPUT and OUTPUT, and signal an error when compiling.
Thanks in advance for the discussion.