I just dislike the namespace pollution that calling 'use' entails, such as not knowing exactly what functions it imports.
in reply to USE or Require?
If the docs aren't enough, check the source. And if that isn't enough either, the call use with parameters, as in:
or for that matter,
use CGI qw(:standard);
to import nothing. use is done at compiletime, and thus IMO is preferable in most cases. I only use require when I need to do conditional inclusion of something.
use CGI ();
You have moved into a dark place.
It is pitch black. You are likely to be eaten by a grue.