It always amazes me when people on the AdSense forums just don't get basic differences in behavior. A recent example of this is when Google posted Ad and image placement: a policy clarification over on the AdSense Blog.

For some people, this was seen as a major new rule. If it's a new rule, how come they called it a clarification?

But what really got to me was posts like this one: 'Why is "misleading" user with an image is not appropriate, but "misleading" by blending is, and encouraged?'