这种商业模式有很大的缺陷，如果谷歌和其他搜索引擎的用户投诉搜素结果有遭污染，他们将严厉打压劣质内容和垃圾邮件。

This business model could be dented badly if, as seems likely, Google and other search engines crack down hard on poor-quality content and spam that their users complain are polluting search results.

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实在简单，他们点击“前进”，并发送垃圾邮件的投诉。

It is really simple for them to click "FORWARD" and send a spam complaint.

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举一个例子，在澳大利亚，ACA(澳大利亚通讯权威机构)负责对垃圾邮件执法行动，并有权调查对垃圾邮件的投诉。

In Australia, for example, the ACA (Australian Communication Authority) is responsible for enforcing the spam Act, and has the power to investigate complaints about spamming.

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