Nope. Not the case in Michigan, which was at the forefront of developing Grandparents' Rights in the US.
Because Michigan courts are currently handling custody matters of the children, Larry and Therese McComb are pretty much guaranteed at the very least visitation under current Michigan statute:
This new law provides the safeguards required by the Michigan Supreme Court, which would protect parental rights, as guaranteed by the Constitution, while setting in place standards for grandparents who have been denied seeing their grandchildren and gives them an opportunity to come to court and show why they should have a right to see their grandchildren, if that request has been unreasonably denied.
Standing
The new law provides grandparents, in the following circumstances, rights
to request relief from the courts to see their grandchildren, if they have
been denied visitation by a parent:
1. If there is a divorce, separate maintenance, or annulment action pending
between the child's parents, or such an action has already been finalized.
2. The grandchild was born out-of-wedlock and the parents are not living
together. However, this only applies, to grandparents of the alleged father
if he has been declared legally to be the father of the child by a proper
court proceeding and the child's father provides child support in
accordance with his ability to provide support or care for his child.
3. Legal custody of the child has been given to a person other than the
child's parent or the child does not live in the parent's home (other than a
child who has been adopted by a person who is not the child's stepparent).
4. A grandparent has taken care of a grandchild during the year before they
request visitation, whether or not they have done so by a valid court order.
5. The childs parent, who is a child of the grandparent, is deceased.
A hearing will be granted on a grandparent's request in the circuit
court/family division assigned to the case.
At the hearing, the court will
presume that a "fit" parent's decision to deny a grandparent visitation
request does not create harm to the child (mental, physical or emotional
health).
The grandparent who is requesting visitation has the duty to show
the court by a preponderance of the evidence (51% or more) that the
parent's decision to deny visitation to the grandparent does create harm,
either mental, physical, or to the emotional health, of the child. If the
grandparent does not prove this to the court, by a preponderance of proof,
the court will dismiss the grandparent's petition. But, if the court is
convinced that the denial of visitation has the potential to create a risk of
harm either to the physical, mental or emotional health of the child, then
the court will follow a set of factors in determining what amount of
grandparent visitation would be in the child's best interest.
MORE:
http://www.grandparentsrights.org/analysis.pdf