Can someone post the command to create these messages or at least tell me what portion of the transaction this is being stored under? I am curious. My chain is a bit out of date, but I was able to generate the messages http://pastebin.com/wdpF4L4k

~/.bitcoin/blocks $ ls | xargs strings -n 20 | tee ~/Downloads/hiddenblockchain.txt

https://en.bitcoin.it/wiki/Original_Bitcoin_client/API_Calls...

Are they just sending coins to an invalid address (their string)?