1. A court may find that a petitioner is a vexatious litigant if a person, other than the protected minor or proposed protected minor:
(a) Files a petition which is without merit or intended to harass or annoy the guardian or a parent of the protected minor or proposed protected minor; and
(b) Has previously filed pleadings in a guardianship proceeding that were without merit or intended to harass or annoy the guardian or a parent of the protected minor or proposed protected minor.
2. If a court finds a person is a vexatious litigant pursuant to subsection 1, the court may impose sanctions on the petitioner.