Yeah I'm not sure this story makes sense either. Shoes may act as an insulator but wedding rings and belt buckles would presumably conduct.
Additionally potential differences tend to attract rather than repel unless these individuals were also charged with the same polarity as the field as far as I know.
Good point, a repulsive effect would have to be the same charge sign so no bug zapper.
When someone is talking about insulating shoes their point is that the body is electrically isolated from the floor. Without that isolation charge can travel between the two. Concrete and skin are fairly good conductors by comparison with air or insulators.
Wearing a conducting ring might make it easier for charge from the air to move into your body through your skin - but it will not make it easier for that charge to get to the floor (and then to ground) from your body.