Bryan Derksen wrote:
A person who wants to take Wikipedia's database and set up another encyclopedia site doing the same things that Wikipedia does _is_ free to do so, even with the fair use material, since the fair use exemption is not Wikipedia-specific but rather _use_-specific. If we can do it, they can do it.
Furthermore (and I suspect this point has probably been made already, but it's worth making again) if they have a problem with fair-use images, they can trivially strip them out of the database, since we bend over backwards to tag them as such.