Heh. Some people I follow on twitter often get people responding to their jokes and intentionally non-factual tweets with "Well, actually…". Which led to their labeling this practice "#ACTUALLY" and the people who do it "#ACTUALLY twitter".
I really dig how people are starting to nail the social tone-deafness and misplaced pride in trivial knowledge this involves. It doesn't mean you're smart, it means you're dumb in a way you probably don't even grasp.
http://tirania.org/blog/archive/2011/Feb-17.html