I'd also like to see a law making it criminal for a site to post such information without also obviously posting that charges are dropped. You have one week to either take it down entirely or clearly mark it as dropped. If neither is done the post will be considered extortion.
A very minor burden on news sites that have to update old articles. A big burden on the extortionist websites. And by making it a criminal matter it doesn't matter if the site is hosted offshore.
Not only should it be criminal, but people should also be able to file civil suits for damages against businesses that are willing to expend resources to dig up and publish criminal charges and arrest records, but refuse to expend any resources to follow up on their published claims.
It's one thing when tabloids parade around dirt on public figures, it's another thing entirely when the same is done to private individuals.
I think what you really want is just transparency.
Arrest type information just needs to be more publicly available so these secondary sites don’t need to exist.