This is more of a case of legal bullying than anything. The Paperboy and Perlentaucher decisions have been rather clear on that matter. There have been also decisions that 10 word snippets or so are fine under citation rules.
(Ok, "completely legal" was a bit of an overstatement. It's not explicitely allowed and you would probably need large enough legal fund to defend yourself.)
(Ok, "completely legal" was a bit of an overstatement. It's not explicitely allowed and you would probably need large enough legal fund to defend yourself.)