What he should or shouldn't be doing with respect to his job is determined by his manager and company - not by the public at large, fortunately. While the obvi

What he should or shouldn't be doing with respect to his job is determined by his manager and company - not by the public at large, fortunately. While the obvious case can be made that someone could have been more professional in this situation (as with almost any situation) - there is very little in terms of expectation set here. No promises of consequence were made, no binding contracts... and for all we know, the behaviour of the applicant in this situation was part of the hiring manager's decision process (whatever that might be)