I have family members who take me to task for using it and ask me not to post photos of them or their family members there. I feel like they look at me as if I lack some morality because I keep my account. They've suggested to my wife that she delete hers.
I have a number of friends and contacts like Walt Mossberg (contact more than friend) who have deleted their accounts for moral reasons and given other ways to contact them.
I keep my account open because it's the only way I can follow certain people like Carol Guzy, the 4-time Pulitzer Prize winning photojournalist I admire so much. And for some people like my godmother in Canada, Facebook is her only network and the only means of communication we have besides talking on the phone.
I'll pop in every few days to see if I've missed an engagement announcement for a friend as well. I have friends who work at Facebook, some of whom love to lurk on Cake, wonderful people who say they wouldn't work there if they thought the company was immoral.