Like CoD, Halo:CE and similar games before it, they had the ability to let YOU, yes you, to start hosting your own games the way you want it to. Seriously, there are folks who actually want to play the game properly, and one way to do that is to learn the map layouts.
How the hell are you going to do that
properly if you are under fire left, right and centre (presumably from hackers)? Crytek should consider this in future revisions of the game. :/
Signing off,
Halodude047