Hacker News Reader

I don't doubt that, but I never see links to the SFW boards. I almost exclusively read or get sent links to /b/.

Why would anyone ever send someone a link to /b/? Threads last half an hour, tops. By the time the person sees the link, the thread has likely 404'd.

IM, not email.

Edit: Apologies, my bad. Misread.

I think you misread, nobody was suggesting to lurk 4chan at work, in fact the exact opposite.

In practice, the "SFW" standards on 4chan are quite lax. Case in point: /g/ (the technology board) and /v/ (the video games board).

I'd think twice before browsing either of those boards at work.