Shame there is the still existing visual sync issue. For anyone that has their client say "out of sync" and requires something like 350k more blocks to be downloaded. Just ignore it. It's a residing effect from the previously mentioned initial attack on the coin. The client is able to see the unofficial blocks but it will not download them due to checkpoints. Because of this you will end up with a visual discrepancy saying that your wallet is out of sync, all the while it is synced and fully functional.
I was really hoping the change to the IRC channel would resolve this but I guess it's just not sufficient to just change the channel. Although the rogue peers are not connecting to it we are all connecting to each other and telling each other about clients we know about, such is the nature of p2p.
I'm going to have to look more closely at the code and see if I can get it to automatically add a banscore of 100 to clients not named as "GameCoin" going forward.
As ruecanonrails points out it's merely an annoyance to see your client trying to sync. Your wallet will not download anything other than the official blockchain, at least up to the last block that has a checkpoint (48,500).
Is it maybe somehow the case that you lot do not know of the handshake bytes that coins use to prevent them from connecting to clients that are actually of other coins?
If you are using the same magic bytes that identify some other coin, instead of using new unique sequence of magic bytes that uniquely identify your clients, then that is why other coin clients are still able to connect to you. Basically your client is deliberately pretending to be one of their clients.