If you choose values that have viable, realistic alternatives that a sane organization could reasonably target then you don't need anti-values explicitly stated

If you choose values that have viable, realistic alternatives that a sane organization could reasonably target then you don't need anti-values explicitly stated. If this is not the case you have a bunch of platitudes. Your company values should often be interpreted (negatively) as strong opinions or even "an attitude". I think Basecamp does a good job of this, regardless if you agree with them.