It occurs to me that one source of this phenomenon is the fact that in the blogosphere we assume that silence gives consent, while we do not assume this in the same way when we are talking face to face. (Google)
If “silence gives consent”, then let my voice be heard loud and clear by these various governments: I am a sovereign individual and your presidents, senators, congresspeople, and other functionaries do not represent me. (Google)
Silence gives consent. Scream and be heard! (Google)