I most definitely agree, if they're improperly wrapped or hindering the movement of the fetlock joint.
It's silly and I do it just to make myself feel better, but I enjoy wrapping all four of my mare's legs in polos in cold weather. Because I hate when my muscles are cold. I know a sufficient warm up is enough, but I feel a little better.
We don't jump anything big, especially in the winter because less work on both of our parts and harder ground. I know polos are not for support, but is it okay for me to keep the polos on when jumping? I just wanted to have another opinion. Thanks! (: