Or detect a proxy and refuse service (which, if I was doing this, is exactly what I would do).
"Go ahead, make my day." If you can detect the proxy box I used to sell via MII, and refuse service to it, I will post a retraction right here.
Not to mention those to derive advertising revenue from "views", and have no way to measure them in a cached environment.
"No way"? How about: rfc2227.txt -- Simple Hit-Metering and Usage-Limiting for HTTP. J. Mogul, P. Leach. October 1997. (Format: TXT=85127 bytes) (Status: PROPOSED STANDARD)
If I was doing that, I would also deny service to proxy servers and display a nice message telling the user to remove the proxy or bitch about its forced use.
Playboy.COM did something like that to @Home last year for a similar reason. -- Paul Vixie La Honda, CA "Many NANOG members have been around <paul@vix.com> longer than most." --Jim Fleming pacbell!vixie!paul (An H.323 GateKeeper for the IPv8 Network)