Instead, Bracewell probes could very well outsmart their own makers and transform themselves into machines quite unlike the quaint transponders imagined in "The Galactic Club." Once the potential of nanotechnology and self-replication are accounted for, the potential for visiting ET craft appears nearly limitless. Not only could such emissaries engage an emerging technical civilization in an excruciatingly patient dialogue before alerting others, they could choose to remain chameleon-like, perhaps operating in the background like stealthy computer viruses.
Elsewhere in the post I misspell "devices." This is undoubtedly the result of writing immediately after drinking a Heineken at the bar down the street at 1:00 in the morning.