What are these categorization services called? I want to read more about them. Do they do things like block sites known to contain or support hate speech too?
Administrators can choose to allow, block, or warn (user must confirm they want to view the page) for each category. The proxy vendor doesn't choose what is or isn't blocked; they leave it to the customer to decide what they want to block.
Hate speech is usually a category for proxy appliances/services, yes. Blue Coat categorizes it as "Violence/Hate/Racism".
Administrators can choose to allow, block, or warn (user must confirm they want to view the page) for each category. The proxy vendor doesn't choose what is or isn't blocked; they leave it to the customer to decide what they want to block.
Hate speech is usually a category for proxy appliances/services, yes. Blue Coat categorizes it as "Violence/Hate/Racism".