Thats so funny man that address is likely the reason of orphan. Some newbie miners must be pointing their bitcoin address to worldcoin p2pool.
I run p2pool nodes and also develop code for p2pool so i'm sorry to say that your statement is invalid... If I point anything but a VALID address to p2pool, the amount generated either remains on the p2pool wallet or on the specified payout address that the p2pool op has.
Ok, I still don't get it... how can this happen and more than that, the wallet address has more than 1 valid wdc blockchain transactions on it.
http://wdc.cryptocoinexplorer.com/address/1HDaL8YaYWwsnAjLTj1952EWuFvhuavqCdi mean... it even is a valid BTC address:
https://blockchain.info/address/1HDaL8YaYWwsnAjLTj1952EWuFvhuavqCd