Made in abyss has some REALLY questionable jokes, but calling it a pedo manga is stretching it.
That said, if i had to bet which author is a...
This one and the Dragon Maid one would be at the top of my list. But who knows, maybe they simply have a weird sense of humour.
Damn, i love it.
It reminds me of a tweet i saw a while ago (in spanish, paraphrased):
"Fuck off, you are not a revolutionary communist fighting against revisionists, you are in your home in your pajamas about to have dinner and watch a movie, stop LARPing"