Ray Saintonge wrote:
Another thing to keep in mind is the three-year
limitation for taking
action on a copyright violation. If something has been on the site
for at least three years it is probably safe to keep. The argument
that continuing availability may result in new limitation periods can
probably be countered by invoking the doctrine of laches.
However, republishing in another medium, such as publishing a print
edition of Wikipedia, probably would easily restart the limitation period.
-Mark