Link is not safe. Not for work, not for anywhere.
I think that in the privacy in one's home these letters can be read by the not-faint-of-heart. This pales in comparison with the shenanigans explored by the the Marquis de Sade's stories...
When you walk into a bathroom and it smells greatly of poop, you are disgusted but not surprised. If you smell even a hint of poop upon opening your refrigerator, won't your disgust be much greater because it is amplified by surprise? Once your expect and accept the fridge poop, it really isn't as bad as the bathroom poop, but before that...