It's done intentionally as a safety measure so non-hackers can figure out what NSFW is before you screw yourself. If you're serious about viewing, try some copypasta. Guess it worked for a limited time for me at least. Freedom limited by the internet now. USA going to bomb it?
http://static.4chan.org/image/4chan-leech.png No. It is redirected. I don't think typing something in a URL is gonna make a difference here. Mumble, find another link.