Yea, I was erring on the side of caution here. Any fully automated import would have to skip any free text, because it *might* be protected.

I think  there is a danger to be overly cautious. The purpose of infoboxes is to express knowledge in a consise way. One might want to add an additional protection by refusing any text that consists of more than 3 sentences or a given number of words (20?). But free form text like (from http://en.wikipedia.org/wiki/Mysql):

License	GNU General Public License (version 2, with linking exception) or proprietary EULA

 

is not creative and thus not copyright protected.