The Internet The Best Comments On The Internet Are On Alternate History YouTube Video Channels
I mean, maybe in some military-history message boards when guys start arguing about the effectiveness of short swords in close combat is better. MAYBE.
comment sections
The Internet 
The Internet The Comment Section For Every Article Ever Written About Breastfeeding
"Sounds like a tongue tie!" and all the other comments you'll find on a breastfeeding article.
The Internet The Comments Section For Every Video Where Someone Does A Pushup
"That's not a real pushup. Your form is totally wrong."
"It's still more than most Americans will ever do. How many pushups have you done today? And guiding your mouse without supporting your elbow on your armrest doesn't count. Sitting kills."
"That's why I never sit. Every morning, I throw my computer out of the window and race downstairs to type on the keyboard before it hits the ground."
"What she's doing, it looks like sex. I'd let her do a pushup on me."
"why the fuck did you film this vertically"
Humor All the Posts on Every Third Trimester Message Board
"how to self-induce??" and other standbys from third trimester birth boards.
Food All The Comments on Every Recipe Blog
Every single kind of comment you'll find on a recipe blog.
Humor Internet Commenter of the Year Award
This Year's Commenter Award acceptance speech from BobInDenver.
Humor The Comment Section for Every Article Ever Written About Tipping
Nicole Cliffe identifies the comments most likely to be found on any article about tipping.
