Clearly not assigned to only Muggleborns (or even Muggle-raised) given that the Weasley twins openly lamented receiving the notices at the end of the first year reminding them not to cast magic over the break.
As to its effectiveness, both I (and apparently at least one other person) already spoke on it.
Draco didn’t have a wand yet. Officially. No reason to be tracked.
Clearly not assigned to only Muggleborns (or even Muggle-raised) given that the Weasley twins openly lamented receiving the notices at the end of the first year reminding them not to cast magic over the break.
As to its effectiveness, both I (and apparently at least one other person) already spoke on it.
Draco didn’t have a wand yet. Officially. No reason to be tracked.