You can't un-see something. The boss can read your email and anyone can run your licence plate. The magazine you left face up on the back seat of your car displays your home address as well as your interests. Now, consider your garbage. The Supreme Court, Justice Douglas dissenting, long ago ruled that once you throw something out, it's no longer private property.
Cops dig through garbage cans, sleuths steal stuff from shredders and un-shred it.
If you tear something up, experts will un-tear it. The more you rip, the more important it is to you, they figure. There was fraud involved to the tune of tens of millions of dollars. But Stannis knew the ins and outs of the legal system. We couldn't prove anything from the legal papers he'd filed.