alt Hacker NewsAnd content limits. Why can't my password contain the % character? No special characters? What makes a character "special"? Why can't it contain emoji? So many password systems go to great lengths to remove potential entropy and randomness from passwords with their rules. The usual excuse is "blah blah blah legacy systems" which is not a good reason.
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Probably because there is some mildly decent reason (or very good, I don't know) to avoid them and it really doesn't matter enough to worry about getting around it.
Why would you want emojis in your password? It's a piece of text not meant to be seen, emojis are meant to be seen. Just randomly generate some characters and get on with your life. I don't understand why you care about this at all, it's such a pointless thing to complain about.
Personally, I wouldn't use anything beyond ASCII in a password. I don't want encoding bugs to lock me out of my encrypted partition or bank account, thank you very much.