Without Google Translation (In Chinese): https://github.com/996icu/996.ICU/pull/24904#issuecomment-47...
The block isn't very smart if it can be circumvented by adding random query parameters with a question mark.
If you don't know much about the page and get a 404, maybe you just roll on.
If you know to circumvent it, then you probabbly know a bit more about the page anyway, maybe not the person they're trying to filter it from.
At least from UI testing we know that a thing not working, or just working slowly is enough to turn away a lot of people.
But it is a github repo. Only a small number of interested people are going to be headed there