Well, if you mean "subversive" in the sense of undermining, then I would say the best thing you can do is absolutely nothing!
There is nothing more powerful than your absence, particularly if you are or were a mainstay of the congregation.
With your disappearance comes questions. With your continued disappearance comes conjecture and supposition.
Some, some will say what you will expect, "they were weak," "there was always something about that person," " they are materialistic."
But others, others will reflect on the reality of your absence particularly if you continue being the same old lovable person you are. They will wonder just why you disappeared. Yes, they may say or audibly agree with the conjecture and supposition, but inside, deep inside they are asking themselves questions, first about you....then about themselves.
Subversion at its best!
SOP