The Management do not recommend leeching posts from ACF, but we can't stop you doing it.
Legally we think you're OK unless the traffic increase ends up doing a denial-of-service attack on the server, in which case you can be prosecuted under the Computer Misuse Act, should the BD complain. Morally...well, we think the posts are owned by the people who posted them, but it doesn't stop Google caching them without your permission. WANAL (WANL?), though.
Definitely don't take anything from Private Matters.