Why do Fox News sources not have last names?

I don't pretend to know whether Fox thinks it's protecting its "sources" or if they're protecting themselves, but this seems odd to me, and a little scary.

Are people really targeting Fox "witnesses," are they afraid they might be targeted, or what?

Do "man in the street" comments need to even have "first" names? And if so, why?



https://www.foxnews.com/world/united-nations-worth-money