Every character in Ed, Edd, and Eddy is dead and living in purgatory.
destroyer47949’s theory about the children on this popular Cartoon Network series is pretty out there. (But it has merit.) Apparently, every child on Ed, Edd, and Eddy is dead, and the cul-de-sac they live in is purgatory. Furthermore, all the kids come from different time periods. Eerie.
Angelica is only imagining the babies in Rugrats, because they never existed.
Creepypasta details a Rugrats conspiracy theory so sinister that you’ll never be the same. (Fair warning.) According to the Wiki, bossy and pigtailed Angelica imagined all of the Nickelodeon babies because she was lonely and had a neglectful, workaholic mother. Tommy was stillborn; Chuckie died in a car cash; and the DeVilles had an abortion.
Doug was sexually assaulted by his neighbor Mr. Dink and started taking LSD to cope. (From the Nickelodeon show Doug.)
The Internet is a screwed up place. According to this Creepypasta theory, Doug was molested by his childless neighbor Mr. Drink and starting abusing LSD as a blocking mechanism.