My sister's garage does a roaring trade in fixing suspensions, so she should be saddened if they go - but she wants rid as well. I think they should go.
We have none at the entrances to our village and the speeding problem is bad. One thing that has worked is a sort of scarecrow. Someone had the bright idea of stuffing a set of navy overalls and attaching a 'head' with a peaked cap on it. A hi-vis waistcoat, and a cardboard tube covered with black plastic attached to the 'hand' completed the look and our 'speed-cop' is propped up in various places. It definitely works, I've seen drastic slowing as drivers spot 'him'. The other week he was peacefully mending something on the underneath of a parked car with a leg stuck out in the road!
A lot of us have also stuck '30' signs on our wheelie-bins, so when they are out for collection there is a wall of '30' reminders. We are trying to get the community speed gun. Lynda on the Archers has organised the same. Offending drivers are reported to the police, who issue a stern letter.
Why the 20 limit outside schools is enforced in the holidays is, however, beyond my ken.