Fair enough. The kernel maintainers are probably much more aware of this than the average open source project. Maybe for some projects it would change their mindset from knowing that this could be happening, to knowing that this will be happening.
Maybe it's a pipe dream, but I have a feeling it could lead to discussions of "what could we have done to catch this automatically," which in turn would lead to better static analysis tools.
Edit: It would be about as useful as pen testing that includes social engineering. That is to say, everyone knows there are dishonest people, but they may not be aware of some of the techniques they use.