F.O.G Fear Obligation and Guilt
Just about every JW related activity is based in F.O.G.
Preparing the Watchtower for the Sunday meeting for most JW's is done out of obligation and guilt rather than the sheer joy of learning. When one disregards the feelings of obligation or guilt and doesn't study their Watchtower, anxiety sets in because on some level they still believe that not following through with the obligations placed on them by the Watchtower Society, will bring displeasure and eventually wrath from God.
For practicing JW's there's not only the concern about displeasing God but in addition, they fear being looked down upon by their JW peers who may notice that there aren't any colored lines drawn in the paragraphs of their Watchtower.