Google deliberately instituted a cultural policy where employees were told to "bring your whole self" to work. The belief was that a person does their best work (and the company performs best as a result) when people bring the totality of their values and interests to work. This made it so internal discussion forums covered topics that would be completely inappropriate at most other workplaces, and people are encouraged to voice their opinions in company meetings. Likewise, there was a spirit (in principle though definitely not in practice) of "everyone here is equal," which again encourages people to be very loud.
