If you read the law Stephenrezz, you will see that saying 'in my opinion' only offers partial protection if the website publisher leaves the posts on display for any length of time.
Wow...if that is how you translate US defamation laws, then you ABSOLUTELY are not suited as a moderator of a site that would be concerned with such laws. I suggest you leave these matters to the owner of the site until you gain a better understanding of the law. I am guessing from your gross misunderstanding of this law, you also do not understand the laws regarding satire as well in this context. Again by your logic, how would your mention of IH being the antichrist not fall under the same logic you speak of? This would ABSOLUTELY be considered defamation towards IH in your framework. =facepalm=
EDIT: Do you also realize you would have to remove every negative remark towards IH or any member on here if what you say were true and enforceable? Do you understand that most of this forum would contain actionable legal pitfalls by all of the commentary here toward IH and other members? Wow....