There's a well-established tradition of pull requests and issues being used for commentary and humor.

Here's a selection. The first one is by the founder CEO of a company with a ~$1B valuation that's prepping for an IPO and is very similar to the one everyone here is complaining about. The second one has comments from a couple well-known tech folks. And so on...

https://github.com/saberma/shopqi/pull/409

https://github.com/h5bp/html5-boilerplate/pull/1074

https://github.com/ericf/yui3-gallery/pull/21

https://github.com/WhiteHouse/fortyfour/issues

https://github.com/joyent/node/pull/2472

But apparently now that Microsoft is using GitHub, everything is Serious Business™? Is there a dress code now, too?