They would have written
"Happy b3taday... eerm... whatsisname!"
( Slippery Jim Seeking a psychotic lady for fun & sex & crime., Sun 10 Jul 2005, 3:19, archived)

Or maybe...
""

Nah, couldn't think of anything good.

Nightynight.
(Elfroid How Long Have We Had These?, Sun 10 Jul 2005, 3:21, archived)