Yes there is a risk to walking around but if you are laying down on the couch or in bed there is much less of a risk. Now I know that people scream and yell about it but if you are a commuter on a bus, there are no seatbelt and you sit sideways on some of them. Also there are people who stand the whole ride. We do the same thing in subways. So, the states and cities run the buses and trains but they donate require you to be seated and buckled so why would they in an RV. Is there a risk, sure but is it a big one? Depending on where you are is the answer. Driving up and down 81 or 95 we are usually seated and buckled in but out on 90 in Montana with nobody around, we will move a bit more.