I think it's more "Don't be evil[ be two-faced]". Being evil exclusively would actually be detrimental to their company. If you're two-faced, you can say "Yes

I think it's more "Don't be evil[ be two-faced]". Being evil exclusively would actually be detrimental to their company. If you're two-faced, you can say "Yes I work for Google and help harvest data for their monopoly to the detriment of humanity, but I'm a really nice person outside of work otherwise."