I always wear an anti-static strap they cost pennies so its not worth handling components and risking you or the customers hard earned cash over laziness to put one on....
I wonder how many components have failed after a build due to static discharge and have then just been put down to a faulty processor or ram or whatever...and then Rma'd back as D.O.A...
After sometimes not bothering with a strap years ago, i find after years of handling components and getting in the habit of always slipping an Asw on, that i get far less component failures than i used to.....
Or maybe the Manufacturers quality control is getting better....
We will never know..