FYI, Schenck v. United States was overturned in 1969 (https://en.wikipedia.org/wiki/Schenck_v._United_States):
"In 1969, Schenck was largely overturned by Brandenburg v. Ohio, which limited the scope of banned speech to that which would be directed to and likely to incite imminent lawless action (e.g. a riot)."
So we can tell other people to avoid the draft now, even in a dry bureaucratic sense. In real life of course the draft is slavery and immoral, as Ayn Rand and many others have pointed out.