Alright... I'm going to say this once and i hope you get the message
For starters, the sole reason why characters like Word Girl and Clifford (tho the latter is a bit iffy, but still) are allowed to stay is because of their shows being above the "G" rating (AKA, being PG). Their shows are designed to be enjoyed by all ages alike and not exclusively by toddlers, kind of like other cartoon characters such as SpongeBob.
Whereas other pre-school shows like Peppa Pig, Dora, Curious George, etc, are only made to be shown to a much MUCH younger audience. They are designed to help the kids to develop, and to make way for their interest in TV shows, movies and cartoons.
Now, for the feats, most of these can be easily debunked by just having common sense: Most of them happen in their imagination. And if those feats are real, they're still characters from pre-school shows, so that already kills their chances.
Lincoln VS Henry is a pretty old Battle, it was made 5 years ago, and most likely the writer regrets writing it, or giving it a pretty messed up ending (besides, DB already killed a 10 year old in BenLantern)
Oh and buddy, let me tell you, you REALLY underestimate what an unsupervised kid with a phone/tablet can do, these are the same ones who can watch videos with the most foulmouthed humor at best and even accidentally enter sites for adults only at the absolute worst.
Them somehow stumbling into this wiki isn't the most wacky scenario possible. So, if they end up traumatized or just shellshocked after seeing Bluey getting her innards violently ripped out from her body, then who's the one to blame here? Them, us or the psycho who wrote that?
And as much as we would want to see Caillou getting killed because he's a little shit, we can't risk toddlers seeing any type of gore or violence in here, even if it's just a bunch of words and no visuals.
To summarize: Pre-school shows will remain banned for as long as the wiki lives. And it will remain like that forever, so don't even bother asking again.
END OF STORY.