Greetz!

Its well known that virus writers in the hacking community add small messages, (readable only by other hackers) inside of their virii. Called 'Greetz', its the equivelant of a graffiti tag, that lets all of the people in the scene , know who wrote the virus and can contain "shout outs" to to friends etc.

How about engineering a social virus.

It would need to replicate covertly,
i.e. pass from one person to the next in conversation or over a period of time.
It could have a payload....
It could contain greetz for people in the scene

I'd like to design a social virus, a way of thinking a thought loop.