Aussie_Lurker
Deity
Sorry about that, Impaler, I confess that I didn't really explain my idea clearly enough-my bad
. Obviously an ability to place these units 'ad-infinitum' would be poor for game balance-so there would need to be some kind of limitations in place-both in terms of low success rate and/or good chance of removal of said 'anti-specialists' from a city.
However, I think you are underestimating the potential benefits of such anti-specialists. They can be a good way for players to undermine their opponents in a way which does not necessarily require constant supervision. The Saboteur and Criminal slowly drains a city of its hammers-thus slowing down that civs pursuit of a goal like The Manhatten Project, UN or Spaceship. The Racketeer/Smuggler slowly drains the city of cash which would otherwise go towards research, troop/city maintainance or rushing buildings/units/wonders. Think of it like the slow loss of air from a tyre. Sure it doesn't do much at first-but eventually it will bring the whole car to a halt!
Aussie_Lurker.

However, I think you are underestimating the potential benefits of such anti-specialists. They can be a good way for players to undermine their opponents in a way which does not necessarily require constant supervision. The Saboteur and Criminal slowly drains a city of its hammers-thus slowing down that civs pursuit of a goal like The Manhatten Project, UN or Spaceship. The Racketeer/Smuggler slowly drains the city of cash which would otherwise go towards research, troop/city maintainance or rushing buildings/units/wonders. Think of it like the slow loss of air from a tyre. Sure it doesn't do much at first-but eventually it will bring the whole car to a halt!
Aussie_Lurker.