Roth nodded slowly. "Yes. Yes, I can understand that. I like to leave a mark, as well, but usually just something small." He was trying to work it all out in his head. "If they're thinking of you, though, what's to stop them from turning you in? It's very risky that way. Unless... you do something to them that makes it impossible for them to tell." Like he'd done with Stephen, but they couldn't go around doing that to everyone. He wondered if there was a spell that would make someone unable to speak or write a particular name or description, or force them to deny a particular person's responsibility. Something more secure than simple fear.