[teddyh]

> UTS #39, Unicode Security Mechanisms, changes the zero width joiner (ZWJ) and zero width non-joiner (ZWNJ) characters from Identifier_Status=Allowed to Identifier_Status=Restricted; they are therefore no longer allowed by the General Security Profile by default.

Good, I guess, but I wonder how much will break.

[rurban]

These are not used, outside of attacks. And the serious languages all forbid them already. And the hacker languages do not care at all about Unicode security so far.