[RPatrino]

Here is a novel thought. It it is too unsafe for an on-deck circle, perhaps they shouldn't have one. More so if the field doesn't allow it to be done safely. Allow the hitter to warm up behind a fence. I know some of the newer city fields that I have seen have a little area next to the bench that is big enough to allow that.

In most cases, the leagues that advocate using the opposite side on deck circle are the younger kids. They probably don't need the on-deck circle anyway. For me personally, it was quite distracting to have multiple players passing behind me between batters and pitches. I can see that becoming an issue during a play when one of these young players decides to move to the on-deck circle too early.