Theodora
Arcane
What I am saying is that just because speech is used to do something, that doesn't mean that something is speech.
That is the same as what you are saying when you refer to harassment though. Harassing someone, though it uses speech, is not speech in the same sense as "free speech"; and a speech act is something being done through speech where speech is just a medium for the action.
I don't really get your differentiation here beyond perhaps negative connotations with the specific philosophical framings, honestly.