I always mount my plates with automotive adhesive tape -- creates a really nice clean installation and very tightly installed with no rattles or visible screws.
I always opt for euro style plates with no surround for the cleanest look.
With automotive tape there is no way they are going to come off in one piece though. It's the same stuff they use for mounting some body kit.
F30 335i M-Sport with Estoril Blue II, M Performance Aero Kit, M Performance Exhaust, M Performance PPK, Adaptive Suspension, Variable Sport Steering, Revised NBT Pro Nav, Sunroof, 19" 403M, HUD, Rear Camera, DAB+, Comfort Access (20121250 Build, Delivered 25 January 2013)