First off, if you want to find out everything there is to know about someone's life, do a deep search on them (we're talking sensitive info like background checks, police records, social media secrets, public records, etc). You've probably done some “googling” already to try and ruin them, but brace yourself—this goes all the way down the rabbit hole:
Have you ever just wanted to slap a bitch, kick a douche in the balls, or really fuck someone over? Well, the last thing you need on your permanent record is assault and battery, so I would highly advise against physical violence…unless, of course, you're absolutely certain you won't be identified for wrecking someone. In the event you choose to go this route, there are some very affordable ski masks available online or at your local burglar and rapist outfitters.