Yes, saw the excess off those dropout adjusters before you bend one and have the problem of removing it by cutting it perilously close to your paintwork!
I'm not sure how useful they are on a fixie. Generally, every time you remove and refit the wheel it will need to be a little further back in the slot, so the adjusters would need to be wound back too. Maybe convenient on a low mileage bike if you remove the wheel for transport or have frequent punctures.
On a derailleur bike they were there to adjust and maintain the correct "angle of dangle" for the rear mech by moving the whole wheel. The B-tension screw, which does the same job, became necessary with vertical dropouts.