One possible consequence is that Sirius could make their lives a living hell. He has a fierce temper and a strong sense of loyalty to Harry. He might constantly intimidate the abusers, making them fear for their safety. If they are at Hogwarts, they could be expelled. And in the long run, they would have to live with the guilt and shame of what they've done, especially if the wizarding community shuns them for their actions.
Sirius might use magic to punish them. He could hex them or use some other form of magic to make them feel the pain they inflicted on Harry.
The abusers could face legal consequences within the wizarding world. Sirius might report them to the proper authorities, like the Ministry of Magic. And if it's the Dursleys, they could lose their guardianship of Harry. Also, their reputation in the wizarding community could be severely damaged, as Sirius would likely spread the word about what they've done.
A practical answer is Chapter 142, because it turns the idea into a concrete scene. The chapter opens with The ingredients for making Buddha Jumps Over the Wall were still on their..., adds pressure through The unique taste and aroma almost blew his eyebrows away., and ends on Wen Jiaojiao.
If you want the clearest chapter reference, go to Chapter 103. Early on, Jiang Yan looked at Zhao Lang with suspicion, eyeing the dark substance in...; later, the chapter leans on It's not going to make my face fester, is it?" Zhao Lang smiled, "Do I....
A practical answer is Chapter 144, because it turns the idea into a concrete scene. The chapter opens with Ordinary people would have been at a loss in this situation by now., adds pressure through You people must be reincarnated from starving ghosts—such fast eaters., and ends on He then noticed.
A practical answer is Chapter 164, because it turns the idea into a concrete scene. The chapter opens with Damn, the production team is so shady, they're still doing a live..., adds pressure through Let's congratulate Jiang Yan for getting— a one-point card!" Jiang Yan: ?, and ends on The current.
The best chapter pointer here is Chapter 137, "Lai Fu's Death Has Another Cause". It opens with Jiang Li personally went to Lai Fu's tomb and performed a small ritual. and closes on At that moment, Qi Tianyu had just finished his farming tasks, feeling....
Look to Chapter 111 for the clearest answer. It begins with The main room's door was pushed open just a crack, and the head of the..., keeps building through Miss Jiang, you're still up, that's great., and lands on This time it was in a dream..
A practical answer is Chapter 132, because it turns the idea into a concrete scene. The chapter opens with The new girl in the live-streaming room went crazy., adds pressure through Stay away from my fragrant and fresh Brother Daniu!] [Not only has the..., and ends on He stir-fried the other.
Chapter 162 is the strongest chapter-level answer because it starts from He Yun then realized what was happening and subconsciously wanted to check... and follows through on Having heard the news, Director Sun personally came with staff to pick.... The payoff is that the chapter closes with "?
If you want the clearest chapter reference, go to Chapter 129. Early on, When they saw that the live chat was full of praise for Jiang Li, those...; later, the chapter leans on Had they been used as pawns by publicity accounts?!.
Chapter 107 is the strongest chapter-level answer because it starts from On the plane, when He Yun had taken off his mask and greeted her... and follows through on Although Su Yinwan's recent change in temperament had been hard for her to....