Anti-Cheat Protection Plans?

Are there any plans to add protection against DLL injections or other forms of external interference in s&box?

No

But how will we keep out the Linux users?

you can put EAC into the game if you want to add anti cheat

Considering the whole point of this platform *is to be an open platform*, EAC or any anticheat seems counterintuitive to this plan. If you're making a standalone game with the engine though, I think it should be an option