The innocent people caught in the net aren't the only victims though. Entire families will be broken by the 50% false positive rate. You can easily end up doing more harm than the abusers with your line of thinking.
Granted, assuming law enforcement is reasonably competent, the false positives shouldn't result in anything other some wasted time for whoever has to look into it...but that's quite the assumption to make.
I am saying that if you are type of person who wants to be accurate, you should look deeper into this space. There’s many opinions that are easier to hold when not having to test them. I had to change my positions.
Granted, assuming law enforcement is reasonably competent, the false positives shouldn't result in anything other some wasted time for whoever has to look into it...but that's quite the assumption to make.