What's the problem?
Unsuitable content (Nude, violence, ...)
Abuse / Harassment (Someone is attacking me)
I appear in this video without a license
Security (Someone is using my image)
Copyright infringement(Someone has copied my creations)
Trademark infringement (Someone is using my trademark)
Other legal issues (including the breakdown of a technology solution, such as providing a program that creates a serial number or serial number)