Blockland.us is currently enduring a distributed denial of service (DDoS) attack. This means that someone is using a bunch of different computers to send garbage traffic to the server, crowding out legitimate traffic and slowing everything down. You may or may not be able to connect to the website or play the game while this is happening. You may see the error "Trying to write without having successfully downloaded a manifest." and be unable to launch the game.
To my knowledge, nothing is being hacked or stolen or whatever, this is just a data crap flood.
This does not mean that civilization has ended and you can spam garbage posts all over the forum. I will ban you and then you won't be able to play the game or post on the forum.