Answering questions, giving talks--hell, just showing up--has the potential impact of inadvertently helping recruitment and retention. You are another person that others look to as an example of a happy JW.
Go and build a life worth living.
Polish your shoes and wear your suits out to dinner at a nice restaurant. Give talks at Toastmasters. Say hello to the ignored people at atheist meetup groups. Join a choir. There. I just replaced all of your positive jw activities.
I sometimes wonder what's worse, fading from NAMBLA or fading from the JW cult.