Hacking into a dating website is not analogous to merely observing someone stealing. If you set up cameras pointed into my bedroom, I'd have a big problem with

Hacking into a dating website is not analogous to merely observing someone stealing. If you set up cameras pointed into my bedroom, I'd have a big problem with that even if it did catch a burglar. The fact that some people approve of vigilante justice and disrupting the personal lives of people they don't like doesn't mean it's a good idea. There are many obvious historical examples of terrible harm that sort of thinking has caused. If you think adultery is a crime that requires help from people not involved in the marriage, I suggest you campaign to make it illegal in all states and ask for police resources to be dedicated to it. If you see someone stealing, you should call the police.