✔ 最佳答案
Reporting correspondence helps. Find a violation that you believe a trusted reporter is likely to flag. The fake Yahoo Support # spam is an example -- especially when you see it in this Yahoo Answers category (where lots of trusted reporters hang out). Keep reporting the spam, and eventually your trust-level will increase.
Also, avoid category specific reporting. Report violations wherever you see them. Of course, you have to know the rules to be effective.