With just 200 workers your Camponotus ligniperda colony is still in it's infancy, they will become more aggressive as they grow (this species can grow to several 10000 workers).
My Camponotus barbaricus started to actively attack food insects once they passed around 800-1000 workers, so there's still some way to go. Camponotus grow extremely slow at the start but pick up speed dramatically once they passed a few hundred workers. Mine (they are sort of fast growing) had 6-monthly population stats of around 0, 4, 200, 800, 2000, 5000 - I think you can see where this is going.
So don't worry, they will become aggressive, you just need a lot of patience with Camponotus.