I'm not a hacker but recently I was able to get someone's email password. I want to teach him a lesson to be careful when using internet and to pay attention to his passwords but I have some problems:
I don't know him and can't contact him face-to-face.
He doesn't check his emails( there are tons of unread messages ) so I can't send him a message.
I don't want him to know my identity so I can't contact him on Facebook .
I was thinking of hacking his Facebook account and displaying "you've been hacked " message but I don't want to go into illegal stuff. But I just can't leave him like this: what if someone stole his account. He is very vulnerable. What do you suggest to do?