As can for example be read here and here, creators or webmasters of websites are responsible for the content of their website, even if the material leading to legal issues (for example disputes concerning copyrights, domain names, trademarks, defamations or obscenities) is not posted by themself but users of the site.
I am interested in learning about how MathOverflow deals (and dealt) with such potential legal issues today (and before joining the Stack Exchange network). Which (if any) preventive measures does (or did) MathOverflow take to avoid getting into trouble such as it might come up in the context of being responsible for the content of the site?
I read somewhere (in the context of joining the SE network) that a corresponding MathOverflow company was founded too. Is founding such a company advisable when setting up a public Q&A site, for example to avoid a single person to be responsible in case of upcoming legal disputes and issues? Does MathOverflow have the continuous support of a lawier who can step in if needed?