You're not oversimplifying from my description, my description was just too simple itself! Unfortunately, no, it wouldn't work like this. The whole idea is that the cell would pick up anything and discover that it isn't as dangerous as it thought. That's the opposite of what we'd want for cancer cells!

Luckily, there are many, many other treatments for various cancers coming in due time, also. My research is actually closer to cancer research than immunology, so I can tell ya-- there's good stuff coming!