I got the idea from python and I use repeating double quotes ( " ) or chevrons ( > ) to demarcate the quoted text without spoiling the quotes within the text. It just feels cleaner in a way.
If the idea of triple-quotes holds utility, what does it matter if it's "improper syntax" or not? I find your need to squabble over quotation styles pretentious.
I don't personally care, unless it's in a context where the expectation is that the language will be, well, "normal." I just thought I'd tease out what I think is being the criticism.
In any event, this is a matter of punctuation, not syntax. As for nesting quotations, you want to alternate between single and double quotation marks. It's pretty rare that we go beyond two levels of nested direct quotations in English, so it's rarely ambiguous.
The poster explained their preference for the triple-quotes in a clear and completely non-inflammatory way, and then got shit on for being pretentious. I don't find that to be acceptable.