>I'm not using ppp, and would like the routes to go away. My last attempt,

I believe that the only way to get those ppp lines to disappear is to
remove or comment out the following line in your kernel config file:

pseudo-device   ppp     2               # PPP

Slimilar for your sl0 report.  (SLIP line)

-- 
Phil Nelson                       NetBSD: http://www.netbsd.org
e-mail: phil@cs.wwu.edu           LPF: http://www.lpf.org
http://www.cs.wwu.edu/~phil       !gifs: http://www.lpf.org/Patent/Gif/Gif.html