On Wed, Nov 6, 2013 at 5:50 AM, Matt Corallo <bitcoin-list@bluematt.me> wrote:

Relay node details:
* The relay nodes do some data verification to prevent DoS, but in
order to keep relay fast, they do not fully verify the data they are
relaying, thus YOU SHOULD NEVER mine a block building on top of a
relayed block without fully checking it with your own bitcoin validator
(as you would any other block relayed from the P2P network).

Wouldn't this cause disconnects due to misbehavior?

A standard node connecting to a relay node would receive blocks/transactions that are not valid in some way and then disconnect.

Have you looked though the official client to find what things are considered signs that a peer is hostile? I assume things like double spending checks count as misbehavior and can't be quickly checked by a relay node.

Maybe another bit could be assigned in the services field as "relay". This means that the node doesn't do any checking.

Connects to relay nodes could be command line/config file only. Peers wouldn't connect to them.