As long as the horse is still listening to me, I ignore calling out. If I'm walking out on a trail on a loose rein, not really asking anything of him, and he calls out I'll immediately start asking things of him - moving the shoulder or hip over, sidepassing, backing, vertical flexion, small serpentines, anything really. If he does what I ask I let it go.
If he doesn't do what I ask, or if he's not listening, then he'll get worked more. Not necessarily harder or faster - just asked to do more things, in succession, than normal. I generally 'check in' with my horse every minute or two even on a trail ride - again, easy stuff like vertical flexion and moving a body part. I ask, he answers, and we continue on our merry way, usually with no interruption of the ride. If he doesn't answer, or does it wrong, I'll focus on that thing and work on it for a while. Sometimes I might work on it while we ride and sometimes I'll stop the trail ride or whatever and work on just that thing until there's a modicum of improvement, then the ride continues for a while before I ask again, once more looking for a tiny bit of improvement.
With a horse that keeps calling out and isn't listening, I'll do a thing, and then another thing, and then another thing, and keep on doing things until he starts to listen to me. Then I put him on a loose rein and we just ride until he starts calling again, and then I start asking things of him once more. Again, not necessarily making him do anything fast or hard or make him work up a sweat, just a smooth transition from vertical flexion to sidepassing to counter bending to backing a circle to moving the hindquarters to serpentine to … you get the picture. This might all be done at a slow walk, but I don't stop asking questions until he starts to listen.
But if he's calling out and you pick up a rein and he gives his nose, or you put your leg back and he moves his hindquarters over, I wouldn't sweat it. Calling out is annoying but if he's listening to you and doing as you ask he's not technically doing anything wrong.