Electric motorbikes - or 'e-bikes' - may be an increasingly popular way to get around but have been blamed for terrorising neighbourhoods with anti-social and dangerous riding. They have also been involved in two high-profile incidents in Cardiff and Salford in which young people have died.The BBC has been out on patrol with police officers in Bristol to see how they are tackling the rise in illegal use."They're going about 80 miles an hour, doing wheelies and shouting abuse at people while they're doing it."I'm too scared to take my own babies out because of it, in case they get hit or...…Electric motorbikes - or 'e-bikes' - may be an increasingly popular way to get around but have been blamed for terrorising neighbourhoods with anti-social and dangerous riding. They have also been involved in two high-profile incidents in Cardiff and Salford in which young people have died.The BBC has been out on patrol with police officers in Bristol to see how they are tackling the rise in illegal use."They're going about 80 miles an hour, doing wheelies and shouting abuse at people while they're doing it."I'm too scared to take my own babies out because of it, in case they get hit or...WW…