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this post was submitted on 06 Aug 2023
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Even after looking up U+3164 (Hangul Filler), and reading (and rereading) the quoted paragraph:
I don't think I'm any closer to getting it.
Even more importantly, I don't get why it's any more dangerous than the various unprintable special characters (like zero-width-joiner, for example). Is it just because it's relatively obscure? Is it because it has a more complicated use (introducing, and optionally being a part of a Hangul composition sequence)?
It can be hidden in source code, for example to make a lookalike of a variable, there are many implications of that.
Hm, yeah, that's why I thought of comparing it to the zero-width-joiner. However, what I want to know if there are dangers that are unique to that character.