[Commentor] LC-291 Ian Jacobs [Comment] * In my opinion, unless you adopt something more along the lines of what is stated below (a kind of "exception" provision for error conditions) then I think you should delete this one, which, as stated, seems to me to amount to "Do useful things." Again, the note has a very different impact if you are talking about when it's ok to not follow _other_ good practices. [Working Group decision] We are writing for Web people who may not have realised that there is even more variation in browsers on mobile than there is on the desktop. We do indeed talk about when it is ok not to follow other good practices. [Commentor reply] 
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