It's Fair Use. Most of the images like the ones on DA, are under a Creative Commons license anyway. Just don't claim /b/'s memes or they'll DDOS you like Tumblr.
Yeah, I don't really like 4chan either. Post some random nude girl, make comments about boobies and memes, call each other faggots and repeat. Sounds interesting.I avoid 4chan. Nothing but the stinking underbelly of the internet. Nothing but wanna be's, hackers, trolls and people who enjoy drama. I wouldn't mind seeing 4chan or Dncyclopedia Dramatica go by the way side honestly.
stealing images off the internets, for use on forums or just for fun:
how wrong is it? is it very wrong, or just a little bit wrong?
I do not think it is wrong. Although I do understand how it is to buy a nice camera. Drive to a location. Spend all day taking photos. Then loading them into a computer. Photo shopping them. And finally load them onto the internet so some one else can use them. I used to use them in the past I feel guilty now. Al though I give my photos away when people ask... If my photos were published and I did not get paid. I would have a problem with that. If your using someones photos and giving them credit I think that is okay with most people. A link to their site is nice..
I think using a picture for an avatar or in a thread is acceptable, as stealing implies that the owner of such works is being harmed by your use of it. If you aren't making a profit off of it and are not claiming it as your own creation and are giving the original source credit, then it isn't stealing. That said, if something is copyrighted, then make sure you have permission.
As for my opinion on the matter I think it depends on intent, I think use on forums and such would fall under fair use. However trying to sell someone else's work is something I would disagree with. But there is a difference between sharing and selling.
@youhemmein is charging me .005 cents a post for using this avatar.