Yep - the web page is a client-side app, proactively warning the user about problems in the network

Let's get that list!

I wonder if they load the whole list of "bad" terms on the client-side. Wouldn't that trigger the firewall? Unless they encrypt it, or use a bloom filter (which would save some bandwidth)...

not sure if a bloom filter with false positives would be a good idea in this case.

I didn't think of that - that certainly would be a viable solution.