1. Parents who post baby pictures at least once a day on social media. "Oh my God, (s)he is soooooo cute. You're so lucky and I'm so jealous that you have a baby but I don't." That's what you want us to write in the comments section, right?

2. Men who claim that other men are gay when the latter don't think women like Angelina Jolie or Scarlett Johansson are attractive.

3. People who throw empty cans in the garbage when there's a recycle bin RIGHT NEXT TO IT.

4. People who judge you for talking too much about your current obsession (eg. a TV show, or a female celebrity) when they've spent their entire lives talking about sports.

I seem to annoy you more than him.

True. I've noticed my parents sometimes talking about stuff they don't know much about (IT) as though they really were knowledgeable about it. I'm sort of impressed actually, but still false information is false information. Well what I said doesn't only account for Japanese. But since I'm self-studying Japanese, it's all the more painfully obvious to me.

Sex obsessed people.

(I'm not talking about a specific person). I just find it extremely annoying when certain people's lives revolve around sex. When their avatars, signatures, names, posts, jokes, video games are all about sex, it gets a bit much. I get that a lot of you like busty women, but I find some of the avatars utterly embarrassing (like, I don't know, look at those things in private, maybe?).

This goes beyond forums. A lot of my guy friends/acquaintances only care about sex to the point that I find it hard hanging out with them. Just the other day, I was with a friend and we ran into one of my female colleagues who is an awesome person, but not the most attractive woman. As soon as she left, my friend made a comment about how fat she was (she wasn't even obese or anything, she could just lose 10 kilos and look great). And I straight out told him "well, yeah, don't worry, no one's gonna force you to have sex with her". It's as if they can't see a woman as a person, but only as a possible partner/lover/sex object.

The one I love in this regard is when someone starts to tell you about their PC but messes up GB/TB/MB having someone show off their build which weirdly has a 4GB HDD and 16TB of RAM it's like.... whoa, what a build mate!

Or a 2GB CPU :< *shoots self*

I can agree with this and the rest of your post as well! I also can't stand a lot of the anime avatars that are overly sexual. To me it just makes you look like a borderline pedophile when I see an underage girl in some sexual pose or whatever. 

Humans.

And more!