You couldn't have known.
This was a fake question acting as a bait for spam answers. It looks like you were supposed to review the answer, which was deleted as spam by a moderator.
These spammers are getting more clever now. They post real questions and wait a few days before providing an answer with a different account. The question itself looks innocent enough, but the answer links to a product we get a lot of spam posts for.
In that specific case we knew the user names (
EdLyons) and had several other indicators that the question itself was spam, too.
When you're reviewing posts that involve password or file recovery, be a little suspicious. Of course it depends on what you're reviewing:
Questions: There are a few telltale signs like linked network accounts with similar questions, or copy pasted question text. The questions are always about a lost or corrupted file, or a broken .PST mailbox (others include DWG files). It doesn't hurt to flag a question with a custom flag telling us what's up. Of course, if you don't suspect anything with a question, that's also fine.
Answers: Anything involving the keywords
repair in them should trigger an alert. Especially when coming from new users. Note that spammers are also now linking to third party sites, like Google Groups, Yahoo! Answers, or MSDN threads, which contain the actual spam.
Have a look at: The Master Spam List: Known spammers, spam domains, and associated IP addresses
To come back to your original issue: Yes, you did fail an audit. No, it doesn't cause any harm. Was the audit obvious? No. But now you know what our typical spam looks like, so you can flag it next time you see it. And that's a good outcome for all of us.