Knee deep in poop...

Sassy has started a full on campaign to cover every square inch of our house with poop.  We've found a pile every day for the last week and last night was the breaking point.  So, we locked her back up in the laundry room.  We made the mistake of leaving the mat under the litter box and the rug in front of the sink and she pooped on both of those, but not in the box.  Thinking perhaps Sadie using the box is the problem, we cleaned a box and put new litter in it.  After talking about it, Carl and I decided that we would let her out and watch her - if we found a mess, we would show it to her, scold her (not yell) and put her in the cat box.  Carl seems to think if you do this often enough, that circuit in her brain that isn't working correctly, will finally snap on - I'm not so sure but willing to try it.  So, he let her out and twenty minutes later we found a fresh pile in the living room, we showed it to her, scolded her and put her in the litter box.  The next time we scold her, put her in the litter box in the laundry room and lock her in again.  We are completely out of options.