Free speech is not an absolute.

RCW 9A.84.030 Disorderly Conduct covers this kind of behavior, in WA state.

Quote:
RCW 9A.84.030
Disorderly conduct.


(1) A person is guilty of disorderly conduct if the person:

(a) Uses abusive language and thereby intentionally creates a risk of assault;

(b) Intentionally disrupts any lawful assembly or meeting of persons without lawful authority;

(c) Intentionally obstructs vehicular or pedestrian traffic without lawful authority; or

(d)(i) Intentionally engages in fighting or in tumultuous conduct or makes unreasonable noise, within five hundred feet of:

(A) The location where a funeral or burial is being performed;

(B) A funeral home during the viewing of a deceased person;

(C) A funeral procession, if the person described in this subsection (1)(d) knows that the funeral procession is taking place; or

(D) A building in which a funeral or memorial service is being conducted; and

(ii) Knows that the activity adversely affects the funeral, burial, viewing, funeral procession, or memorial service.

(2) Disorderly conduct is a misdemeanor.