Yeah, they can, it all depends on how clumsy you are parking lol. I've got a bit of curb rash from the previous owner where you can tell they ran over a parking stall. As long as its a quality kit from a good manufacturer (which duraflex is), you shouldn't have to worry about it breaking.
Also, welcome to Focus Fanatics!
Originally Posted by matmatician
What spare tire? The one that adds weight? Psh. Its wherever my A/C is.
ROTM June '13, PNW Crew #42, SR #245, Rally Rev #02