Adding the command line -BattlEyeLauncher into the launch properties will stop battleeye from loading.
At the moment nothing changes in-game as the multiplayer is not enabled yet but that might change in the future.
Hell the multiplayer is separate from the campaign...so it looks like they're going the Rockstar route and making multiplayer it's own thing. So cheating should be fine so long as you stick to single player and don't try and be a douche in MP.