Tech Step said:...I usually use these to make the accademy (bonus production)...
Remember that the academy works different (+50% prod) and can only be built if you have researched Education.
One more thing I noticed in testgames:
When I stole a worker early, the AI didn't calm down after some time, instead their attitude went consistently down to -13. I don't know if that's a matter of the patch or the aggressive trait.