Common mistakes in smartphone sites
Good news from Google: it’s going to start actively penalising sites for perpetrating the worst practices for mobile e.g. redirecting a specific “desktop” URL to a the homepage of the mobile site, or for shoving a doorslam “download our app” message at users.
I wish that we could convince people not to do that crap on the basis of it being, well, crap. But when all else fails, saying “Google says so” carries a lot of weight (see also: semantics, accessibility, yadda, yadda, yadda).