For what it is worth in Ubiquity version 2.9.15 using a number doesn't work unless you leave the hostname a number and then enter a password in the password field (see bug 928447). So people may be discouraged by the hostname already exists on the network message and change their hostname to NaN.
For what it is worth in Ubiquity version 2.9.15 using a number doesn't work unless you leave the hostname a number and then enter a password in the password field (see bug 928447). So people may be discouraged by the hostname already exists on the network message and change their hostname to NaN.