I wouldn't want to wear scissors around my neck, that would drive me crazy fumbling around for them. I keep 2 pr of Squizzers on my longarm machine..
http://www.sewingmachinesplus.com/c3138.php
They are the neatest things..no danger of snipping fabric instead of thread. I dulled one pair to use for frogging stitches and the other I use to snip threads. I keep Gingher snips by my sewing machines.