Afraid of putting the motherboard in the case?

Now I know a lot about building PC's but when i put the stand offs, and then put the motherboard in, im afraid i will fry the bottom of the motherboard but rubbing against the stand off....help?
 


Hm...makes sense but if i try shoving it in using the IO ports and i hit one....or do u mean the only part that will "hit" it is the hole?