alternatives to private RFC-1918 addresses on public routers

[William Allen Simpson <wsimpson () greendragon com>]

When I complain, I prefer to suggest alternatives.  In this case, the 
two that come to mind are:

 1) unnumbered interfaces.  I've used these with PPP for years, but as 
    I remember, there was a problem with Ciscos.  Has this been fixed?

 2) host routes.  Rather than creating /30 subnets for links (wasting 
    2 addresses for each 2 used on a link), go all the way and use /32 
    for each address.  This make the local routing table a bit bigger, 
    but the entries are rarely used, and aggregated at the boundaries.

Thoughts?

Isn't there a link around somewhere on this?

What about a link for bogon filters to use at boundaries?  

WSimpson () UMich edu
    Key fingerprint =  17 40 5E 67 15 6F 31 26  DD 0D B9 9B 6A 15 2C 32