The topics should be changed to only allow staff to see content in the report. Having the reports and screenshots open to public means that the hacker may see the report before it is dealt with, upon this they would delete/transfer items and or change their name.
If not perhaps change the rules and ways people report to pm'ing instead with a how to guide in the report a rule breaker section, with links and/or step by step pics. (I don't mind putting one together, if people are too lazy to do it.)