Earlier quoted context omitted.
Every company I've worked at has had an explicit policy of not commenting on that company's business on the internet.
Just because a company has a policy does not mean that employees adhere to that policy.
They might just say, 'That seems silly!', 'You're a nut', 'Do you have a source other than yourself'. Or they might just downvote stories that have a negative effect on their income.
You've got 100k people working at google and many of them are going to be active on this type of forum. The same goes for the other big guys that have a ton of employees