Final answer:
Students should refrain from posting inappropriate content and engaging in cyberbullying on social media sites to avoid negative consequences.
Step-by-step explanation:
The student's responsibility on social media sites includes refraining from posting inappropriate content and cyberbullying. These actions can have severe consequences, such as college rejections or job denials. It is important to think about the long-term effects of social media posts and consider how they may impact personal and professional opportunities.