I have conducted an informal survey of all the bloggers I know, and come to the following conclusion:
I will start taking (and posting) pictures when/if I have children. Nothing will stop me from posting them. I will post a lot of them.
This will make many people happy, since pictures of children are widely reputed to be well-received.
(Yes, this is a sorry excuse for not taking OR posting any pictures of social functions, special events, or other things that probably I should be photodocumenting. But I don't really have anything better to go on.)