The Daily Grind: Read and understood
End-User-License-Agreements, Terms-of-Use, Terms-of-Service. Some MMOGs and virtual environments get you to agree to them on first-use. Some get you to agree on every load and/or every login. In all cases, proceeding to click through indicates that you have (a) read it, (b) understand it, and (c) agree to abide by it. It is a legal contract between you and the operators and developers of the service.
But frankly, did you? Do you? If the agreement contains specialist legal terms, it is technically not even possible for the average user to proceed with any level of informed consent without considerable research. It is even possible that many of these agreements may fail to stand up in court -- there's certainly precedent for that, depending on how finely you slice it.
Do you read these manifestly lengthy and fearsomely involuted tracts? Do you understand them? Or do you just click on through and don't care what it actually says?
