Of course, a global attacker can always muck with the system. I was talking about single independent peers behaving badly on their little scale, such as returning wrong or no information, which I believe is more likely to happen.
Also, the guys at Bittorrent are pushing for a limitation on how you can form your own ID based on your external IP [0], which should make it much more costly to perform a large-scale attack.
Also, the guys at Bittorrent are pushing for a limitation on how you can form your own ID based on your external IP [0], which should make it much more costly to perform a large-scale attack.
Thank you for being pedantic :)
[0] http://blog.libtorrent.org/2012/12/dht-security/