It might be, depending on the integrity of "the system".

I can make a system that flags stuff, too. That doesn't mean it's any good. If they can show there was no reasonable cause then they've got a leg to stand on.

It’s the literal truth. How can that be a false report? A false report means you reported something you know to be untrue, not that you relayed bad information.

relay bad information, that suggests negligence, rather than willful omission or deception

It would only be negligence if the police were considered like some sort of dangerous wild animal that people need to avoid provoking, and can't be held responsible on its own.

Which may very well be accurate, but I can't imagine the law ever punishing someone on that basis.