I run our corporate proxy and security made the call to block ‘personal’ sites since it was basically the Wild West of content...

At one of the large companies I've worked before, the corporate filter barred access to https://graphics.stanford.edu/~seander/bithacks.html because it was a hacking website. Which it cleverly determined, you've guessed it, by checking the URL and seeing it had "hack" in there. Everything with "hack" in the URL was banned.

Pretty sure all those JavaScript ninja hackers they'd hired were a little baffled that they hire hackers but don't let them view nasty hacker pages...

I worked a job where the web filter blocked the majority of blogging platforms as "social media."