Someone spends hundreds of hours of their own time working on a blog post that is amazingly informative and you aren't going to share it because they put some fun in it.
If you work in a conservative shop, this is a real concern – there are still IT shops which have formal dress codes, etc. and managers who frown on anything like this as a sign of unproductive. Yes, that's pointless and wrong but that doesn't mean that there aren't people who have to worry about it.
It doesn't mean that aphyr was wrong to include them – if you do the hard work you can style it however you like – but it wouldn't surprise me to learn that some people do something like run it through instapaper before circulating it to the button-down set.
