So, she decided to make a wish on them. After pulling the wishing stone from her bag, she said "I wish ..."
She didn't want to punish them. After all, they didn't do anything wrong. Karyn and Jon were part of a group of students who weren't goths, but didn't call them names or discriminate against them. They didn't deserve the type of punishment she was doling out to the true bigots. Hell, Jon's sister was a goth.
"I wish that Jon and Karyn would swap with the next two people they encounter and that the change would keep them from hunting for the stone until I am ready to swap them back.