I agree with this writer, I really don’t understand why the use of single exclamation marks are considered to be such an abhorrence. Of course, she’s from Britain, where I suspect even general danger signs are symbolised by a punctuation mark.

I don’t endorse the extensive use often seen around the web (f****** brilliant!!!!!!!!!!), but used sensibly, I think exclamation marks do serve a purpose.

Exclamation marks have suddenly become everyone’s favorite grammatical pet peeve, and it’s all just silly snobbery, really: “Look at me, I’m expressing surprise with my bare words (!)”

Ariane Sherine on what makes acceptable punctuation | Comment is free | The Guardian

I like exclamation marks!!! Not to that extent, but I do. I use them sparingly, to liven up dialogue, signify volume and incredulity, and inject punch. But this, according to certain other writers, is a gross literary misjudgment on a par with ending a sentence with a comma,