Laws only affect the law abiding. The Columbine shooters used no magazine larger than 10 rounds, yet one of them was determined to have fired 96 rounds. Short of the .gov going house to house and confiscating all of the estimated 750 MILLION so-called high capacity magazines in current circulation, new legislation banning them will only affect those that care about obeying the law in the first place. Criminals will continue to commit crimes, as they have since time immemorial. Had the theater shooter chosen to run over the line outside the theater in an SUV with a 20 gallon gas tank, would anyone be campaigning to limit fuel tanks to less than 10 gallons?