I suspect that ANY metalworking should be done with due respect to the materials being used. Having used drill press/metal lathe/various power saws/welding equip etc for about 60 years, most 'safety' comes second nature. Piano wire is cut with a tiny cut-off saw in my Dremel - much safer than big cutters
When bending the wire with a vice and hammer - do it slowly and start hitting the wire away from the bend, slowly moving toward the vice as the desired angle is needed. And almost as important - use good quality wire - I guess most of us use K&S - its about all I can find locally!
Oh- and dont try staightening a mistake and trying again........
Pat (who wears plastic lensed specs anyway..)