I have one, but only because the art center where I teach really wanted me to do something.
An old student put it together for me, and it is suppose to be updated shortly.
I don't pay any attention to the traffic and some students check in as they ask questions. Am not interested in the social networking sites, and in reality if it wasn't for school it is doubtful I would have one.
It seems everyone with a camera these days has a photo website with their watermark pasted all over the place annouceing they are a photography; but until the work proves they are I pay little attention.