In a somewhat similar vein, I've always found it odd that engineering students commonly refer to themselves as engineers. I agree with much of the linked article and believe the title of engineer implies that one has already gone through a rigorous testing and certification process and that you conform with continual professional development and regulation. So it irks me slightly to hear a first year student call themselves an engineer. It feels like a medical student calling themselves a doctor.

In other fields where the title most designates that you regularly do an activity and does not imply certification and strict regulation I think it's fine to call yourself by that title even if you are a student. Many CS students are programmers, or PhD candidates in mathematics are mathematicians.