P2P projects have structure and hierarchies, but they are flexible. They are not structureless or hierarchy-less.
"Feminist and civic action groups of the sixties and seventies ... discovered that structureless anti-authoritarian modes actually lead to hidden power distributions, so that it is important to have open and transparent procedures that can insure a flexible and wide distribution of power." — http://www.permanentculturenow.com/43-essential-essays-on-the-commons-and-peer-2-peer-theory/ about The Tyranny of Structurelessness
- The Tyranny of Structurelessness by Jo Freeman, Berkeley Journal of Sociology, 1970