Hot answers tagged support
The page where you can find the API key for your registered application says that the key doesn't need to be kept secret: [The key] is not considered a secret, and may be safely embed [sic] in client side code or distributed binaries. Abuse is typically an issue for the end-user, so you shouldn't be concerned about it beyond recognizing backoff ...
The code in question was not generated by Stack Exchange. It was generated by a user. So, yes, quite often, the HTML (and all other code samples generated by users) will be malformed. However, in this case, note that <li> tags are not required to have closing tags. I agree that it is bad form to leave them off, though.
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