I know of MANY Witnesses that would pioneer or volunteer for something, as an act of penance for their sexual sins or desires, even if they were married!
It would have been the opposite for me. Whenever I felt extra sinful, my conscience wouldn't let me go from door to door, recommending my way of life to other people when I wasn't living it properly myself.
The funny thing is, looking back....other than the occasional temper tantrum or cuss word, I never did anything to be ashamed of....but I sure felt like I did. Then I find out that a bunch of people I know, were living double lives while knee deep in organizational activities.