Hello, and thank you for your post.
I have looked at the demo, what we do in this situations is to give a warning at first, then a light punishment and then ban the player/s if they continue. Both of them are new players, and I am sure that they did not read the rules and you did managed to infect the other one
I will consider this post as their first warning and if it happens again then we will take action.
As you can tell, I will not ban these players, not now at least.