Thank you, Soaring29, for the additional info. IT IS MY OPINION--not really, but if I remember correctly, the burden of proof of slander/libel is reversed in the UK. There, the defendant has to prove the truth of her statement; i.e., PL would have to prove ALW was a crazy alcoholic in 1994. (I think there's a link to exactly what she said many pages back. It was basically just that.)
But PL's actual lawsuit was for breach of contract, it seems, and I don't know what the requirements are in either country. But in the U.K., the loser of a lawsuit automatically pays legal costs for both sides. Here, that only happens if the judge rules the lawsuit was particularly egregious and unnecessary. So, in general, there is far less litigation in the U.K.
David, "allegedly" is very different from "in my opinion", but it isn't a magic phrase either. When a journalist says something has been alleged (whether in a court document or a statement by someone else) she is saying that what follows is something somebody else claims to be true, it is not true of her own knowledge and belief. This is why Goldberg uses it: she's reporting what somebody else reported, not what she herself knows.
Kathy Griffin uses it in practically every sentence, but it's schtick to her: Griffin knows her work is protected in most instances as satire, which the Supreme Court of the U.S. has ruled is protected by our First Amendment. (Donald Trump learned this the hard way when he sued Bill Mahr for saying Trump was the spawn of an orangutan. The court ruled Mahr's remark was biologically impossible and therefore obviously satire. Trump lost.)
The only place I know of where a claim of "opinion" makes a legal difference is in establishing "ownership" (my word) of the potentially libelous remark. The news feed I get on my phone from Microsoft/NBC says before each editorial that "the following content is the opinion of the writer and not that of Microsoft" et al. That is an attempt to shift the blame to the writer.
So saying your post here is your "opinion" may protect BWW.com, but it won't keep you from being sued if somebody actually thinks your post is important enough to fight. Usually, a request to remove it is enough, since the medium on which the statement sits doesn't want to spend time and money proving it is your opinion, not theirs.