Modern technical writing - Andrew Etter 2016

The legal problem
Specifics

Unfortunately, doing your job well might actually cause lawsuits. I've heard unsubstantiated rumors of patent trolls using publicly-available technical documentation as evidence of infringement. In this case, the open, forward-thinking spirit of enabling users to contribute to the documentation can be financially disastrous for your company. You might need to keep your source files in an internal repository, rather than GitHub. Further, you might need to protect your documentation website behind a customer login page. You should still use lightweight markup and distributed version control so that coworkers can contribute, but the general public might not be able to.

In short, assholes ruin everything.