[jmatt]

Of course,

These characters aren't easily type-able and most password crackers that I've seen use common ascii/ansi characters not obscure characters like this... It's all relative I guess. There obviously exists a case where these characters aren't helpful.

[mattmaroon]

Can you realistically crack an 18 character random string, even if you know the character set? I mean, I realize that technically increasing the character set would make it harder, but for any web-based service cracking something with 62^18 (or more if other characters are used) possible combinations is impossible in the real world.