I wonder whether this actually works:

> Q: Do we need to worry about search engines penalizing apparently duplicate posts?

> A: That's why the POSSE copies SHOULD always link back to the originals. So that search engines can infer that the copies are just copies. Ideally POSSE copies on silos should use rel-canonical to link back to the originals, but even without explicit rel-canonical, the explicit link back to the original is a strong hint that it is an original.