Etiquette is just handle the reports in your section alone unless it's s spammer, bot, or someone joining to advertise leaving a damn mess all over the forum. Then bam them and delete the threads. But usually the section mods will handle it in day or so (especially The ROM Hacking since their thread approval system is nuanced, things take a bit longer there).
If a week goes by and nothing's happened, just poke the mod via PM or make post in the text box on the report page WITHOUT closing the report! I cannot tell you how many times I've done that lmao. They can be reopened but it's still embarrassing hahaha.. ( ;´Д`)
TLDR: stay in your lane unless someone be really making a proper mess of the forum..