What does this mean?
It means that if you use a public hack (TFTLocal, TyranO's Maphack, Opensource Maphack, etc), it will most likely result in getting IP banned for some time, or maybe getting your cdkeys banned/muted. Please be aware that playing with cheats is still fine, but using third-party tools to directly alter Warcraft III is not. Bots and other clients which do not know the Warden protocol will be disconnected within 2 minutes of connection.
Is there a bypass?
It depends on what you mean by a 'bypass'. There are two ways to completely circumvent Warden's data sending; complete disconnection from Battle.Net once you join a custom game, and using listchecker to join/host games.
How do we disconnect?
1. Download 'DropBnet2.zip' (attached) and extract it into a new directory.
2. Open up 'settings.txt' and uncomment the server(s) you which to disconnect from and save.
3. When you are in a game and are ready to disconnect, just execute 'DropBnet2.exe' and it will disconnect you!
4. Play with hacks!

5. Once you have finished your game, Warcraft III will alert you that you have lost your connection.
6. Close Warcraft to get rid of any active hacks.
7. Open again and connect.
8. Repeat from step 3.
How do we use listchecker?
http://bonta.kun.free.fr/listchecker/