Imported functions only work if the application explicitly binds them, with BindAllImportedFunctions (or manually with BindImportedFunction).

If you want to give an explicit error if the script declares imported functions, then you can call GetImportedFunctionCount after compiling the module.

Shared classes doesn't share the data itself, only the code. It is used to allow the application to pass objects between modules and allow them to understand each other. But if the application do not pass the objects between modules then the modules cannot access another module's data even if it declares shared classes.

Here too, if you want to give an explicit error if the script declares shared classes, then you can enumerate the class declarations after compiling the module and check if any of them are shared by getting the object type flags and check the asOBJ_SHARED bit.