It's very easy to get bogged down, in a case like this, with the letter of the law and no-one is likely to be held accountable for any infringements - especially as "real" crimes are going uninvestigated because of lack of resources. What it is important to remember is that the law was written, in essence, to prevent someone profiting financially and commercially from someone else's work, and nor should they. However, friends sharing a pattern doesn't fit into that scenario - the "borrower" probably would not have gone out and bought the pattern otherwise and if the pattern is out of print they would be unable to do so anyway. No-one in this case is losing out. It's little different to me buying a designer frock and lending it to a friend.