If someone puts inappropriate content into Careers profile by mistake or intentionally, what happens then? Is profile prereviewed by moderators? Are there any requirements (completeness, etc.) for profile to be visible in candidates search?
We do have moderators on Stack Overflow Careers but we don’t actively review profiles. You can always email us at firstname.lastname@example.org if you spot something inappropriate.
Completeness factors into search results, yes. It’s not a question of visibility, it’s a question of strength in particular technologies, as indicated by experience, SO rep, open source, etc. Less strength means a profile will appear lower in results.