If you don't want to be a MS anymore then the easiest way to do it is probably to just to become unreliable in your assignments, do less, refuse talks due to other commitments, illness etc (a new job will be very useful in this).
Don't worry about not being seen as in good standing - if your goal is to fade away then that will happen anyway. Just make sure you keep your mouth tight shut on any beliefs you may have and just blame commitments of work for your non attendance.
oh - and be careful how much identifiable info you put into on here!
Good luck!