Social media 
The Hoax Slayer site has one page that is FB related. Recently, I saw the old email hoax of the two-striped jumper (spider) make the rounds on Zuck's baby. Now, whoever originated this thing did the disinformation. Unsuspecting folks forwarded misinformation. Again, the one who started the FB chain was doing disinformation (albeit more mischief than not, perhaps). But, I saw many reasonable folks take it at face value. There may be several reasons for this: trust of the sender, spider phobia, not taking the time to check out the message before forwarding (Share or Comment in the FB milieu). It was nice to find the Wikipedia page's section on the Hoax. Ought we have a category for hoaxes (motivated by continuing examples which necessitate discussion of this topic)? My little example is probably one of many that were active today where some of these might have been downright malevolent. BTW, this is the status of the page when I last edited (2007). Has the content really progressed from that earlier context? All this verbiage, for six years. It's simple. "Dis" involves a conscious effort to alter (etc.); "mis" is an error (albeit willful in some cases).