[Coder-Com] Allowed Hostnames Patch Required?

[Mark Foster]

#ZT Recently had a security issue caused by an 'interesting' hostname.

theZoMBiE is qqlaw@#!/bin/sh.B-S-D.org was not

Hostnames with ! in them are going to break clients, scripts and Coding are 
they not?

Shouldnt these be disallowed?