Why bathing on stranger’s pond restricted those days?

During olden days it’s been told that one should not take bath in a stranger’s pond because of the fact that the quarter part of the effect of sins done by the owner of the pond would be suffered by the person who took bath. Sounds silly? Yes it’s not the true reason. In mediocre periods, every habit is followed with a reason but without knowing it. The above fact is followed just to intimidate the strangers to avoid themselves bathing in some stranger’s pond. In the olden days itself it’s been found that many of the diseases are water borne. So to avoid the unwanted diseases it’s been told as a restriction to bath in a stranger’s pond. Another reason is to avoid a stranger disturbing a person by bathing in his pond.