Yes, you can have a watermark of your personal identification number printed on your photograph. Provided you wish to enable the watermark mode, do so in the section the path to which is as follows:
The Information System People Settings Chování aplikace select photograph mode
Nevertheless, the likelihood of your photograph being misused is comparatively low since
the System administrators constantly monitor the numbers of photographs displayed to individual
users. Provided one of them has a large number of photographs displayed, his/her access to them is denied.