Quoted in the reference:
Caine said the decision remained a troubling aspect of First Amendment law because it is still used by many courts particularly state to uphold convictions for people who criticize the police.
While the lower federal courts generally follow the Supreme Courts (later) lead in not upholding convictions for fighting words, the state courts have not been as [reluctant] and have stretched the fighting words doctrine beyond all recognition, primarily to protect the police from criticism, with all of the inherent dangers that such an approach presents, Caine wrote.
Ironically, related to the Chaplinsky cases was a later case referenced in the link below (Cohen v. California (1971)).
Read it and weep, all you who would prosecute a man protected by USC (imho):
Later U.S. Supreme Court decisions seemingly curtailed the reach of Chaplinsky. For example, in Cohen v. California (1971), the Court ruled that an individuals wearing of a jacket bearing the words Fuck the Draft in a California courthouse did not constitute fighting words, because Cohen did not direct the message at a particular person or group. No individual actually or likely to be present could reasonably have regarded the words on appellants jacket as a direct personal insult, the Court said.
I, for one, would have been pleased had BLM & its sycophants argued a Chaplinsky-like case against the lawful gathering in Charlottesville, as even with the current court I'd be confident that that's one case sure to be overruled.
.02 http://www.firstamendmentcenter.org/fighting-words-case-still-making-waves-on-70th-anniversary/
Can the judge please order the witness to answer my question?
If you had an 18 year old daughter and this guy walked up to her and said, F**k you without provocation completely out of the blue, what would your reaction be?