Let me predicate what I now say as being just my humble opinion:
It does seem that many (though not proven statistically) the majority of exJWs do swing to the extreme end of the pendulum (whatever the limits of their personal pendulum may be.)
From what I've come to understand, this is a predictable human behavior. In some cases, it may be a latent desire to engage in such activities, suppressed only so long as as the religion, family, and friends can succeed in constraining such extravagances.
otoh, we have the Quakers, who allow, and even encourage, a period of un-restrained profligacy...to be followed by a formal statement of commitment to the religion (or, at least, to become a Mennonite).
Sometimes, in the analogy of "throwing out the baby with the bath water," exJWs indulge in behavior which they will later regret, especially insofar as it violated personal morals that they temporarily ignored.
Craig