Trolling much, AC?
I have written a proxy server. What are your creds?
From the Wikipedia entry on SPDY:
SPDY requires the use of SSL/TLS (with TLS extension ALPN), and does not support operation over plain TCP.
This means that (a) unless you can get the client to install the proxy server's CA, it cannot act as a man-in-the-middle on your behalf, and (b) they know who you are because of the SSL session being unique for each client - there's no mistaking your request for the request of anyone else behind the same proxy. Even more so because it re-uses a single connection. Make no mistake, this protocol was designed to thwart proxies and caching, and making the user trackable for the servers. Speed is the carrot, not the horse.
Similar for HTTP/2.0, which in large parts are based on SPDY, and written largely by the same people.