Re: And can we know what's on this blacklist ?
There's an easy way to find out.
Enter a search term into Bing. If it pops up a message, then that item is on the list. You could even automate it like a dictionary attack (Except here we're testing a search term for a positive or negative response.)
Though IANAL, and I don't know how illegal it would be to possess knowledge of the forbidden search terms.