That would really annoy me! every time you change lanes it beeps!!! It's not like you can't feel the bumps without something beeping at you. It's a poor idea and if that's what they are using to sell the car then it doesn't say much about the car!
I don't know if you can turn the blackspot thing off as i have never read the instructions. I know you can set the didtance it warns you about a camera etc. All i have found is the delete button which removes the accident black spot or bogus camera. I just hope that noone else updates it or they may all come back! The road angle also has a detector for radar guns, but i have never used this, only the gps function.
Something else to be noted about the road angle, the old black ones, like we have, came with a lifetime subscription to the update service, the new silver ones only give you access to the update site for a year or so, you then have to pay an annual subscription.