Most modern operating systems randomize the MAC.
[citation needed]
having the option to randomize the MAC is not the same as actually doing that. There are also a few downsides to random MACs, like captive portals not remembering you on public WiFis.
Librarians are trained to disseminate many different kinds of information and find relevant or related media and publications, because that is literally their job. This skill can be very useful in finding relevant info for checking a news story.