It's because what you said was unbecoming and untrue. [Defensive much?] Tying you up? Please. You'd just burn through whatever I'd use.

[He's still rubbing his wrists when he turns to Dabi, staring hard at him. Shigaraki has that dangerous glint in his eyes that implies he's really hard at working thinking of something.]

I wonder what would work on you, Dabi. A reward system? [He leans in a little closer as if to really size Dabi up.] You're needy. You're the one who came to me after all. It's not my fault I ended up liking what you had to offer.