p2p addresses for point-to-point connections with customers

I've been trying hard to come up with a solution regarding this, but i haven't decided yet which one is the best.

From the perspective of an ISP, how do you characterize the p2p addresses given for a point-to-point connection to a) customers with their own ASN b) customers without an ASN?

These are ip addresses configured on your router's border interface and on the customer's peer router interface (old WAN-style), so they actually are both infrastructure and customer addresses. So... Do you consider them infrastructure addresses or customer addresses? Do you put them in your IGP or in BGP? Do you filter them on your border routers (via iACLs) and if yes, how? -- Tassos