I've seen some very good articles and interviews on this topic, one recently by a Y Combinator alumni Jessica Mah http://jessicamah.com/blog/?p=1181&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+jessicamah/nksB+(Jessica+Mah+Meets+World)
would you?
You can always work on your startup in your off hours. That way you can still keep the dream alive, yet safely in the realm of a hobby. Just make sure you never risk a lot on it, because you'll probably fail.