As of 2019, I have the authority to refuse to investigate and to stop an investigation if I believe the complaint is frivolous or unreasonable or if it was made in bad faith. I must admit that I have not done so yet, because it is very difficult to determine at the outset. You have to investigate a little to see what the person wants and whether there is a link with what was received. You have to do some of the work anyway.
On May 14th, 2021. See this statement in context.