You guys are funny. I used to get super paranoid in the states about cops, helicopters, mechanical pigeons and anything else that I wasn´t accustomed to seeing around my house. Now i´m in Spain, and I don´t feel the least bit paranoid, in fact I put my plants on my terrace to show off to my neighbors. None of them care, they just think it´s a nice lookin plant.
I met another British guy that told me he was growing and while him and his family were eating dinner, a helicopter came down and shined the spotlight through the window. He said he ran to his room and killed the plants, then the police came in and started to search his house. YEAH RIGHT! No offense kingi, but I find that the Brits like to tell stories.
I think Stoney is right, noone gets busted by helicopters unless they have a big ole plantation growin in their house.