* To prevent them from escaping or causing further harm: If someone is a dangerous criminal or posing a threat to others, Spider-Man might need to temporarily restrain them to ensure their safety and the safety of others.
* To ensure their cooperation: He might tie someone up if they're resisting arrest or are uncooperative, giving him time to question them or get them to a secure location.
* To keep them safe: In some situations, Spider-Man might tie someone up to protect them from danger, for example, if they're in a dangerous environment or someone is trying to harm them.
Important Note: Spider-Man generally prefers to avoid using excessive force or causing harm. He primarily relies on his web-slinging skills and agility to subdue criminals. If he does have to restrain someone, he tries to do it quickly and safely, and he always aims to ensure that the person is not injured.