This is really funny to me. I've been on 4chan for just over a decade now, and I remember angrily posting the same thing (I don't want weed to be legal because I think it's wrong) to drug threads on /b/. I was a young teen in high school and my parents had told me my alcoholic uncle was in rehab because of all the weed he smoked, so I thought it was a life ruiner. I freaked the fuck out when my friends started smoking. I wrote my college essay about how much I hated drugs. (Not sure how I got accepted anywhere with that turd of an essay.)
Eventually I found out my uncle was actually addicted to booze, but I kept up my anti-weed slant. For years. Then I went to college, met new people, and I seriously asked myself: "Why am I against smoking pot?" I realized I didn't have an answer. It was a purely emotional opinion. Now I smoke most nights to relax. I'm a lot happier.
I'm looking at this dude's post and all I can see is teenage me. He's smart enough to logically know that pot should be legal, but too upset and emotional to admit it to himself. Admitting you're wrong is hard. It's a long process, and some people never can. But we should all try.