If one wanted to write a blog post about a discussion on a message board or online forum, is it okay to quote from said forum? Can you quote full text from individual posts (say, a question asked, followed by three people's responses, even if there were twenty responses, so you're using only a portion of the text)?
If not, can you post a blog entry describing the online discussion, for instance saying that Suzie said that she knitted a sweater for Ryan, and Mallory posted that Suzie should stay away from him, but Kelly is okay with Suzie giving gifts to her brother? In other words, posting *about* the discussion, rather than quoting it verbatim? Can you quote any portion, if that portion is small? Does it make a difference if the site has a Terms of Service that disallows copying?