Yes. There are plenty of published poets out there who (1) don't understand the grammatical logic of punctuation and (2) pretend to invent new uses when they really just don't want to have to think about the ramifications of what they are doing.
After I posted yesterday's excerpt, I received an email from a poet who is also a freelance editor and a university teacher: "Loved your recent essay on punctuation in poetry. I'm going to recommend it to my creative writing students. So many of them think that punctuation is inherently 'unpoetic.' It doesn't 'flow.' I actually forbade them from using the word 'flow' in class--it became a catch-all phrase for everything from rhythm to transitions--to lack of punctuation."
Here is one teacher who is bravely fighting such laziness. (Also, look at her interesting, unconventional use of the dash.) I fear, however, that plenty of other teachers overlook or even encourage it. As I hope my excerpt made clear, I--unlike Philip Larkin--am no enemy of strange new uses. I tend to be grammatically conservative in my own work, but that's just me.
My book is not intended to be a complaint about the state of modern poetry. I could write one of those, but I'm not terribly interested in coming across as "a faceless whiner who wishes she were more famous than her work deserves," which is the sort of answer I'd get from the sort of poets I'd be complaining about.