I think what @SlugBreath is saying here is that you can't just tear down a garden wall and add a couple of parking spots to the front of your house. You need planning permission for it.
Only the council is allowed to dish the (public) footpath on front of you property so you can drive in and out easily. They will only do that work if you have planning permission.
Mind, there's quite a few houses that probably didn't bother to get planning permission, and solved the old driving-up-the-curb by putting a wooden plank in front of it.
To the OP: if my neighbours would put down cones on a regular bases to reserve spaces on a public road I would most likely accidentally drive over them. Different story if it is for the odd delivery van or similar.
"You need planning permission for it & a few houses" - its quite common and PP not enforced (I believe that you even need permission to tarmac/concrete/cobblelock complete garden as runoff involved but open to correction here)
"Drive over" - Thats criminal damage or wanton vandalism and I would not for a moment support that type of behaviour,