Headstock and string ends? Leaving the whole string uncut might be not so dangerous, but looks really messy and "hippie". Cutting the extra string away guarantees that some day it will puncture your finger tip. I do not like too much of "Jacksons or Floyd Roses", but stringing them is clever. Because You can not get the string end (with the ball) through the bridge hole, I've stringed it through the tuning axel. The ball stays there on the headstock and on the bridge I just cut away the extra and stick the string end in to the bridge - no worries there! But on a "normal" guitar - how do You do with the string ends? Leave it messy, or dangerous - or something else? Of course there's the ideal fender shaft too where You can "hide" the string end inside the tuning pole, but that's something I don't have on every guitar..