Private detective hired to snoop on job applicant’s sex life

Private detective hired to snoop on job applicant’s sex life
The article “Private detective hired to snoop job applicant’s sex life” reveals another scandal of the Deutsche Telekom which reportedly hired an private detective to investigate the sex life of a potential employee.
This article matches our discussion about hiring processes and personnel policies. In this case, the woman that was spied on applied for a management position at Deutsche Telekom’s Croatian subsidiary and obviously, Deutsche Telekom found the sex life of this woman an determining criterion.
We learnt that personnel decisions of a company had to be fair and that its personnel policies should be “based on criteria that are job related, clear and accessible [...]” (book, page 421). I’m wondering to what extent the sex life of an applicant is job related. Probably not at all. Sexuell preferences are absolutely irrelevant for a managment position at Deutsche Telekom.
Apart from the fact that the private life of the woman is not job related at all, the spying is also an interference in her privacy and for that reason likewise morally wrong.
Those people should mind their own business!