flouter

That roots out some of the rule flouters.

She is angry at rule flouters, and at some government decisions.

Musk has groused plenty about labor and public health rules, of which he’s a serial flouter.

Yet he has governed, at least for the bulk of his term, much more like a conventional Republican than the flouter of the bipartisan foreign policy consensus he sometimes postured to be.

It is more distinctive to be a stickler for convention or a flouter of it.