I think the connection has a lot to do with memetics and memes...
And
that has a lot to do with memes being mentioned in relation to the Laughing Man in the first season and with the Tachikomas having a conversation about Richard Dawkins and James Lovelock in
2nd Gig. Dawkins' notion of memes gave rise to a concept called the
ideosphere, the memetic equivalent of Lovelock's biosphere or Gaia hypothesis. As the Tachikomas point out, Dawkins and Lovelock published their first major works around the same time, and while their views don't initially seem compatible with each other (in fact, Dawkins has actively and publicly attacked Lovelock's writings), later work on memes suggests that the micro- and macro-levels aren't too dissimilar. (Dawkins published
The Selfish Gene in 1976, and Lovelock published
Gaia: A New Look at Life on Earth in 1979.)
Memes are taken quite seriously by some cognitive scientists, evolutionary biologists, and sociologists. (Their existence is also hotly debated in those same circles.) Memes and memetics come up a lot in discussions of information theory and transhumanism, as well as in discussions about the Technological Singularity. A concept Dawkins used to argue by analogy has itself become an area of active research.
And the study of memes has had a pretty huge influence on political campaigning and marketing techniques, too. Viral and stealth marketing campaigns come to mind...
I've provided some links that might prove useful to a discussion of the Laughing Man and the Individual Eleven. The first couple of links lead to a kind-of-dated Swedish transhumanist site, but the pieces are in English and offer a good introduction to the field; you might want to look at the first link's glossary and at the second link's diagrams and discussion of meme-cycles:
http://www.aleph.se/Trans/Cultural/Meme ... IDEOSPHERE
http://www.aleph.se/Trans/Cultural/Meme ... cycle.html
If you look at the glossary, I think you'll find the entries for "auto-toxic", "bait", "immuno-depressant", "infection", "infection strategy", "meme complex", "meme-engineer", "memeoid/memoid", "mimicry", "replication strategy", "retromeme", "vaccime" (sic), and "vector" especially relevant to the series.
Here's a link to a peer-reviewed journal covering memetics (currently on hiatus), with an explanation of the field's history:
http://jom-emit.cfpm.org/overview.html