I think that many people who leave the WT [including my wife and I for a long time] carry the idea that the elders are in tune with everything going on - and live in fear of them as a result. This may be partly due to the isolated nature of the religion, and the viewpoint we were indoctrinated about it being so well known and seen in the community.
I had a similar [if unrelated] fear when we first left and we were reading Ray Franz' books behind closed doors in our home. I was always on edge that someone would come to the door and 'catch' us. When I began to take the books with me to the local coffeeshop to read, I carefully marked out the author's name on the cover, and walked with the book concealed under a wrapped newspaper.
Looking back, I doubt if anyone had any idea what I was reading anyway. Once, unsuspectedly, the PO of the congo came into the coffeeshop, stepped over to speak with me for a moment, and laying on the table in plain view was ISoCF [with Franz' name marked out]. He barely glanced at the book, and though we had been missing meetings for a few months by this time, he did not seem alarmed at all with a book with a title like that.
Though it is not impossible for them to find out what you 'are up to' if they wish to - the real key here is: How much do you care? How would being 'outed' affect you in the short and long of it?
I understand the nervousness of this situation very well - I was a 'model' Jw for 48 years, and really feared the results of being out 'officially'. In the end - 8 years later - I wish I has just waltzed into the KH the first day I 'knew the truth about the truth' and lain a letter of DA on the conference table. As it was, I sweated it out for 3 years, missed opportunities to live, laugh and love.
Thanx for sharing your situation with us, and for letting us contribute [for as much as it is contribution] with you.
Namaste
Jeff