Problem player

I created a map specifically for testing purposes. I planned to invite a few trustworthy players so we could test out a few theories, and learn some different game strategies in a controlled environment.

In the game description I specifically stated "This is a TESTING MAP ONLY, Please do not join without an invitation.

Within moments of making the map I had 3 uninvited players and two more followed within hours.

I politely contacted each of them explaining the game description, and asking that if they would like to participate and agreed to specific conditions they were welcome to stay and if that was not what they were looking for, to please find another game more suited to their desires.

One fellow who agreed to all that, has now been causing problems with multiple players, he has sent literally dozens of spies for sabotage into my country, he is (in that players words) "bullying" another player. He refuses to cooperate and I ruining the experiment and experience for everyone.

Can this player be removed?

I know "this is a war game". I get that. It also is a game specifically designed to allow players to start maps with specific goals in mind. When that is done, and a "player" completely ignores all such specifics, surely that is not acceptable?

Sure, in a regular "war" map, "all is fair in love and war" they say. But this is different I believe.

So, can he be removed from that map?