Sins are an invention of religion to make people feel guilty and feel a need to seek forgiveness, which comes with a donation of some kind to the religion.
But you ask if we have broken JW rules that would bring us a judicial committee and if we are more likely down the road to be in that room with 3 elders because of time passing.
We have all done plenty to summon that committee. Time away from the Kingdom Hall increases the odds that they will not bother with us, regardless of how many of their rules we break.
It is much more likely that someone in the Kingdom Hall is noticed for breaking the rules or feels a need to confess and seek forgiveness.
Sure if one walks away, they are likely to start breaking the rules. But a fader is not in-their-faces about it. Besides, one can always end the fade anytime they like and face the committee.