Exploiters can change the game Clientside, but is it possible for Exploiters to somehow access the Teams service (print Teams, change the members, change the Name.)?
Hello, I am actually mainly a developer for exploits. I will explain now, that I develop mainly to test games and notify of bugs. Moving on, so long as your game has no backdoor that exploiters can use to change things on the server, everything they run will only run for them. They can see the Teams, but that's about it. Some exploiters can change their team, but no worries that is also only for the client. Hope this helped!
EDIT: Sadly there is no way to prevent anything that the client needs to see from being seen without causing errors. The reason the client needs to see the teams is so that you can change teams, and use the team functions correctly.