They also said not to "penalize" websites based on user agent. Yet they do it and have been doing it for years. They also said to use valid html/etc while they

They also said not to "penalize" websites based on user agent. Yet they do it and have been doing it for years. They also said to use valid html/etc while they didn't do it for cost saving/performance reasons. Not sure this one is still true. My guess is that this list of preaching water and drinking wine is pretty long for Google. I think their view is they know what they are breaking so it is OK in that particular case. The rest of us has to suck it up.