You’re right, of course, ehehe. Just avoiding to express personal opinions, so that no flamewars or endless arguments waste your day, is not passive enough if you still sign up once and sign in daily. Therefore, the next step is deactivating my account for good while following trusted sources without logging in at all? Twitter cookies would still track my activity, though.
That seems fairly active to me. In almost 10 years I did my first re-tweet last year.