I may be wrong, then. It does happen. Edit: Nyes. I still can't verify it because I don't leave badges uncrafted. My 'badges' come in two forms - not crafted w/ card drops remaining and crafted (w/o card drops remaining). Not saying you guys are wrong, I'm just pointing out that I'm not exactly in a situation to verify it for myself.
I got a friend to give me all his cards so I could sell them for dredmor cards. Well He gave me a foil for killing floor, and knowing him, he is the type to click through the annoucement, open the booster and then not care.