Hi Aly,
O.K I'm prepared to stick my neck out and take the flak
The first time we hired scooters was 13 years ago in Kassiopi, our children were in their teens then and rode on the back of their dad and I's scooters. We had a great drive along to Sidari and had a fab time without any mishaps.
Since then we have hired scooters on many of the Greek Islands and have great memories of it. Getting lost is all part of the fun and so is getting off the scooter and pushing it uphill, but then we will take off up any unknown dirt track we see!!!.
As long as you take your time and exercise caution, pull in to the side and let cars past you should be fine...yes we too have seen many people bandaged up, but I have seen many people with their legs in plaster after a night on the ouzo!
Eileenxx