That's actually a great question.
CoCoRaHS in general has a very robust QA/QC process. Every single report is put through that process to make sure it is accurate. We have had to close some stations because people were using it to push a narrative. We don't do that immediately. We try to discuss what they should be doing and how to report properly. We definitely do sometimes get people using it to push an agenda.
Most of the time when there are errors in reporting, they're either typos or people have forgotten to make a multi-day report and they put a week's worth of precipitation into a single day. That all does go through a rigorous QA/QC process.