I'm not sure worry about this point is useful.
I'm not worried. :-)
Two other comments on this.
1. There will be many cases where there is no user (at least at run
time) to admire the FQDN on her screen. FQDNs will for example be buried
in automatically generated XML documents that are used to trigger network
access in a Web Services environment.
2. FQDNs are now internationalized, so they cannot be assumed to be ASCII strings at all times - in some contexts they will be Unicode.