For the record, rms uses a Lemote [1] computer, which uses a Loongson chip [1] designed from scratch by the Chinese Academy of Sciences.

Given the fact this computer is 100% Chinese design, it's unlikely that NSA is able to add any spyware or backdoor at the source.

[1] http://stallman.org/stallman-computing.html

[2] http://en.wikipedia.org/wiki/Loongson