remember being told that the elders also want to observe whether or not one sings and whether they have underlined the study articles. Funny, I don't recall seeing that in the scriptures.
And based on my recent Memorial experience, even when they do have things "based" on scripture, the scriptures themselves are taken remarkably out of context~!
My (currently DF'd) wife told me they expect you to be present in front of the people. She was having crying spells at one point previously when she was being reproved for a while and said the elders wanted her to be in the main meeting, which she was having a very hard time doing.
I wish it were me instead of her; I'd be drawing pictures of the elders picking their own @sses, etc. and let them catch me underlining that~! Of course, that'd be easy for me to do since I don't agree at all with their views and DF'ing/shunning policies even though I'm sure there are decent elders out there that internally agree some of these policies are just simply hurtful and medievally ignorant.