You definitley do
not need an intro page with a TOS on it. There are many reasons why you don't have to worry about legal action, but let me just give you a few.
- Libel does not really cover defamatory opinions, just false statements. The 1st ammendment guarantees your right to state your opinions, just not to lie about someone else. (In fact, you have to intentionally lie to be guilty of libel, see the Wikipedia page)
- There are literally millions of blogs and personal websites full of personal opinions with no such disclaimers (try http://maddox.xmission.com)
- Your page is probably going to be way too low traffic for it to be worth anyone's time to bother with you.
If it ever does reach any appreciable size, and you are still worried, follow the trend of other large websites with disclaimers and put a small link at the bottom to a "legal" page.