I especially liked fafic=plagiarism. Which is bullshit, since I can rip off other people's ideas in my essays all I want as long (and it's to some degree encouraged) as I give proper credit, which is what disclaimers are for. The phrase you're looking for is "copyright infringement", which isn't plagiarism. kthnxbai.
Another thing I liked:
Fanfic doesn't teach writing. It teaches laziness and stupidity. It teaches you to take the ideas of others rather than come up with something original of your own.
Bitch, please. I can definitely say that writing fanfic has definitely made my writing better.
It's nice to see that anti-fanfic wankers all have the same arguments though. And mpreg is some of the most hilarious stuff on earth.