Touch that cactus and reap the consequences! Besides the uncomfortable stabbing sensation, you may also be charged with a felony or misdemeanor and a fine of up to $150,000, depending on the cactus or endangered plants value.
Laws from 1929 make the damage, removal, or transportation of native plants illegal without first obtaining a State permit. With that said, make sure you obtain the necessary permits before even looking at that cactus the wrong way or you may find yourself in a poky situation.
Source: Central Arizona Cactus