I agree. And I think that the notion that using periods makes you sound angry is nutty.
I once suggested to a young woman with whom I was having an email exchange that she would make herself stand out from her peers by abjuring the exclamation marks.
[Update a couple minutes later]
Oops, sorry. I hadn’t read the whole thing, and didn’t realize that most of it was paywalled. But if you subscribe to the Dispatch (as I don’t), I’m sure it’s an interesting read.