Because it is one of the things that will get you added to the blocklists that form part of the Great Firewall of China.
It won't stop a hacker who is probably bypassing parts of that anyway, but the more casual requests such as those caused by deep linking will generally stop getting through.
It won't stop a hacker who is probably bypassing parts of that anyway, but the more casual requests such as those caused by deep linking will generally stop getting through.