Claims non receipt of low value items (usually sent untracked), then after a while sends this message to sellers (we know of 8 sellers now, always exact copy & paste):

Hello, my pack is not arrived, could you please refund me without opening a practical on eBay or PayPal ?
Thank you.
I WANT A REFUND, NOT A REPLACEMENT.

It has been reported to ebay each time, but he is still active.