Spacers don't cause any issues at all. On a stock ride height car you dont need to worry about rubbing or anything.

The issue with spacers comes when people run the wrong kind too wide... for example some of my 240 buddies will run a 25mm slip on spacer with standard studs, which leaves very little thread left for the nut to grab. Ultimately it either breaks the nut off or the studs break due to how much loading is on them.

the general rule for spacers is this.

15mm or below = use stock studs (or in our case, longer wheel bolts)
20mm = your own decision. Its an odd size so not a lot of people run them. You would be fine with extended studs or longer wheel bolts.
25mm+ = bolt on spacers