] Russell Beattie points out that Google has changed
] their terms of service to require that you not publicly
] discuss AdSense. Jason Kottke points out this "seems
] to fly in the face of Sergey Brin's Google rule #1:
] /'Don't be evil'." Cory Doctorow agrees saying "Google
] shouldn't ask all its users to submit to an unreasonable
] restriction on their speech in order to contain the spread
] of negative information about its service."
]
] Meanwhile, other annoying provisions are that you can't:
] have multiple accounts (which is useful when you want to
] keep separate statistics for separate sites), talk to
] advertisers about their ads, disclose any results, get
] paid for anything Google considers "fradulent clicks",
] find out why they're considered "fraudulent clicks", pass
] on payments to anyone. And Google can cancel you whenever
] without a reason.

Shut Up and Serve Ads (Google Weblog)