Pardon the nooby question, but I'm seeing a lot of discussion about not using these hacks on VAC-protected servers.

How do we tell which servers are VAC enabled and which are VAC disabled?

In the KF2 server browser, I was hoping it was the wave-looking icon in the column beside the padlock, but that's for "Stats Enabled". Also, I'm able to filter servers by "Anti-cheat: Not secure" using Steam's external server browser. But I only get one result.

Thanks in advance.