Allways been contovershal. Some manufacturers say ok others h#ll no. Naturally no hose with exterior metal braid should be pinched. Also, visegrips are NOT the acceptable tool! SpapOn, Matco, and many others build special hose clamp plier tools that cannot cause damage if applied properly, and are self locking. Since fluid should never be allowed to backup in ABS systems, hose must be restricted or completely removed before opening bleeder and reseating caliper piston when replacing pads. Most repair manuals, both aftermarket and OE ok pinch pliers in this situation.
Actualy, I'd rather take a chance on ruining a hose than damaging ABS assembly with trash in a valve.
Bob