[quesera]

Wouldn't such a network filter also trigger on random (in the sense of unpredictable to the reader) pages here on HN though? Or Reddit, etc?

I've never lived under such a regime, but all of the trigger words I can imagine at OP's site are also present in generally-SFW discussion forums.

[corobo]

Yeah but the IT bod looking into it would see the rest of the site as context

If they check on a site and it's heavy on the NSFW maybe things get looked into with a bit more of a "... is this person browsing porn at work?" attitude