It isn't a discussion of the semantics of the word "snitch". Let's use "denounce", if that's more palatable.
Quarantino begs another question in her post (and I am using "begs the question" phrase correctly, if we're getting into semantics). That is: if people aren't part of track and trace (which I couldn't be if I wanted to, as I have a 15 yr old brick mobile which doesn't go online), how would they -never mind the police or their neighbours or so-called friends - know that they were supposed to be in quarantine?