"Won't somebody think of the children?!"
Ignoring the source (it was the only link I could find);
This is why people do it to excess - in my opinion of course.
This is one of about 30 streets I know of in Kent that have Christmas lights up to raise money for the Kent Air Ambulance. Every year my children get excited as December gets nearer, the obvious reasons aside, it means we can spend one day after work driving round looking at all the displays and putting a few quid in the collection boxes.
Pretty lights, charity and happy children - does it get any better?
EDIT: Lee beat me to it, didn't realise there was a second page