Bait? The AI will almost never attack or even target Cancer Cells unless you've got nothing else. Outside of Fallen Druids and Feral Bonds, I don't really see a lot of point in playing this on your side of the field. If there were a RoF that hit your own side of the field, absolutely, but until then...
The real question is: will Cancer Cell even be a card you can play outside of Carcinogen?
BTW, latest word is that it will be an "Other" creature, not a "Death" creature (to prevent Eclipse abuse).