What would really help with the vision here is some way to comment and associate tests against posted code. I have corrected algorithms on Wikipedia that were obviously wrong with even a cursory test. Then people can adjust the snippet, debate the test parameters, or whatever else they need to do while maintaining some sort of sanity check. If it’s good enough for random software projects used by a dozen people, it’s probably good enough for snippets used by thousands of developers and even more users.