Speed humps test

[Seduce XR6]

speed bumps should only be for high speed hoons, why should those of us who can drive safely through or out from a carpark have to suffer?
If they made them a bit lower the hoon crowd with the lowered vehicles would still have to slow while others who would not speed in excess anyway through the area would not have to as much.
Some speed humps are easy enough to go over at 20-30 k's while others scrape your car underside even if crawling over so why the difference?
Or rather what sort of moron makes them so damm high?