[throwaway81523]

Is Posthorn a reference to W.A.S.T.E.?

[47282847]

Not OP but I read it as reference to just https://en.wikipedia.org/wiki/Post_horn

[chuckadams]

I initially read it as "Host Porn"

[craigmccaskill]

Not intentionally, but TIL that this turned into an apt reference. The pynchon connection is excellent.

My (intentional) reference was to the older mail courier horn.