[Date updated: 2021/10/13(Wed) 08:41:46]
 Where did ID:Heaven come from?
 I can't say for sure, but the earliest instance I know of is !WAHa's 
   Wakaba script dated 2004/07/24, where "Heaven" is the default value for 
   EMAIL_ID in config.pl: https://wakaba.c3.cx/releases/Wakaba/
   It probably just spread via the mass adoption of Wakaba and Kareha, and 
   then metastasized once 4chan started using it
   To the best of my knowledge, 2ch, 0ch, futaba, world2ch, futallaby, 
   etc. all used "ID:???", so I don't think it came from any of those