This should read "websites that can't parse mobile links for non-mobile users and vice-versa". There's nothing worse* than clicking on a link on your mobile and ending up getting redirected to the homepage of some sites mobile version and not getting the content you wanted.
*OK, there's a few things worse.
"Everyone should do everything like Rev does. He's the forum Kanye West 21st century role model" - McSwede
"I'm still not clear what your opinion is, other than everyone else is wrong." - Jobbo