Whoever Smelt It, Dealt It

An algorithm has been developed which can effectivly give a robot a sense of smell. As those astute people at Engadget point out, "Although having the boys in blue tracking you down based on your unique aroma fingerprints might seem frightening, just envision the terror that would ensue if an ultra-keen robot was onto your trail from miles away"
http://www.engadget.com/2007/01/27/sniffer-algorithm-leads-robots-to-faint-faraway-scents/

It will be sad if you cannot get away with a cheeky guff once in a while. The last thing you want when you've let one rip is some loud mouth robot telling the world that the rather foul eggy smell has in fact come from your arse.

Still, it could be useful for tracking down the sources of those random smells in your home:

"My God, what is that stench?"
"That will be the decaying corpse of that hooker you killed Dave"
"Oh yeah. Forogt about that. Good call"