How is this 'laundering'? Laundering is putting dirty money into some system and getting clean money back. This appears to be just giving some bitcoins away and

How is this 'laundering'? Laundering is putting dirty money into some system and getting clean money back. This appears to be just giving some bitcoins away and getting nothing back. Forgive me if I'm misunderstanding something. [edit: okay, paulcole just beat me to the punch.]