Millions chanting "NOT MY KING, NOT MY THING" would be far better imo.
Maybe not (for now, anyway) in people's private homes, but just try doing this in public. Look how disproportionately elderly Walter Wolfgang was dealt with for shouting "Nonsense!" at Jack Straw's speech.
We've already had snapshots of what has happened to peaceful protesters in this 'democratic' countries of ours, when they have made their completely non-violent, non-aggressive, non-hateful anti-monarchy views known.
One of the most distasteful was the group of schoolchildren who were presumably encouraged to chant "He's our king" in response to the "Not my king" protesters. I highly doubt those children understood, or were told, the nuance of what the protesters were chanting; I'm guessing their teachers/adults probably framed it that the 'silly' protesters somehow didn't understand the status quo, rather than that they were expressing disagreement at the forced nature of it.
The cognitive dissonance seems to suggest that we all love the monarchy, apart from one or two oddballs, so they rule by common consent and there's no need to re-evaluate whether we should have one at all; but at the same time, when very large numbers of people make it clear that they DON'T support the monarchy, they get clamped down on straightaway and framed for public order or terrorism offences.