Sure. What would Lucius worry about disillusioning Draco? The anti-pure blood wizards don't have a leg to stand on, unlike theists and atheists.

(Think back - do you recall any good arguments made against pure blood, the theory as opposed to the believers? Rowling assumes we'll instantly identify pure bloodism == racism, and that's that. If they think any harder, most people will fall into the usual trap of thinking that exceptions/brilliant-mudbloods like Hermione Granger disprove pure bloodism, which of course they don't. The history of the Wizarding world is even more consistent with pure bloodism than not!)