I am not familiar with regulation in this space, but why should a domain registrar care about a URL shortener that has a pointer to another malicious domain? Th

I am not familiar with regulation in this space, but why should a domain registrar care about a URL shortener that has a pointer to another malicious domain? They can ban the destination malicious domain obviously, but censoring an URL shortener feels like asking a DNS service to not to resolve a website, which is commonly criticized on HN.