[wmf]

I see why that's a problem for domain names, but not for programming languages. You just define that one character has meaning and all its homoglyphs are syntax errors (even in identifier names).

[akgerber]

But what characters are homoglyphs are determined by your choice of typeface.

[jacobbijani]

Introduce a library or something written by someone else that tries to use clever and cute Unicode names, and imagine debugging that.