They wouldn't ban it.
I gave up caffeine for a period of time and now only have it occasionally. I found that shockingly, I need more sleep and I am not rebounding off the walls all the time. If they banned coffee JW's might not be able to stay out till 10 o'clock on a weeknights or work 5 days a week and spend all weekend in field service or at the meetings. JW's are always running around. I remember asking my husband, why if the scripture say that Christian's should live peaceful and quiet lives. Why I couldn't seem to ever have either.