So i read your response and everything you say reinforces my feeling that it is better to publish this than not to. At least this was done not for profit. If the data is collected and the data is for sale (and it is, because i understand it was purchased legally), there _will_ be someone who builds the service for aggregation and searching like you describe. And it might be very expensive, but that crazy ex will pay that $1000 to find the person she is after. In other words, saying "it's unethical to make access to public info easy" is useless; if information is public, someone will access it and someone will make it easy to access. It's better if this is done in a public way and for free, than if someone sells it quietly.