I've never scraped mine but have been mindful when facing large speed humps how I go over them. I have been close to clipping it when parking nose into parking spaces with a kerb in front but have learned to stop a bit shorter or just reverse in (which I usually do).
There are many lower cars on the road, even the Subaru Impreza, which you would think would have reasonable ground clearance being a AWD, is actually lower than the CT.
Watch out for the bottom of the door when parking next to a kerb, especially if the road has a camber. I've found that to be more of an issue than the general ground clearance.