  We argue that the variational method in Wald type thought experiments,
involves order of magnitude problems when one imposes the fact that $\delta M$
is inherently a first order quantity itself. One observes that the contribution
of the second order perturbations is actually of the fourth order. Therefore
backreactions have to be explicitly calculated. Here, we re-consider the
overspinning problem for Kerr-Newman black holes interacting with test fields.
We calculate the backreaction effects due to the induced increase in the
angular velocity of the event horizon, which brings a partial solution to the
overspinning problem. To bring an ultimate solution, we argue that the
absorption probability should be taken into account in Wald type problems where
black holes interact with test fields. This fundamentally alters the course of
the analysis of the thought experiments. Due to the fact that a small fraction
of the challenging modes is absorbed by the black holes, overspinning is
prevented for both nearly extremal and extremal cases. Some extreme cases are
easily fixed by backreaction effects. The arguments do not apply to the generic
overspinning by fermionic fields for which the absorption probability is
positive definite.
