ive seen these in holland.. but not robotic versions.http://www.ananova.com/news/story/sm_701370.html
but typically.. its only for londoners. no public money is allowed to be spent in my city.. unless its for visits from the royal family. ( duke of York ).. and what a dork he is.
actully quite afew of my mates have been taken to cort for this offense. ive been questione donce by the police for it ( years ago ). Ijust said to the officer. if you want to get on your hands and knees and take a sample and get a lab report done to prove its me.. then do it. other wise let me go. he went for the latter.