Is There an Age Limit for Trick or Treating?

This morning on the Rock and Fox show we were talking about the kids trick or treating and when does it officially end for them.

My boys are 13 and 11 and my 13 year old says he's all done going trick or treating, which makes me a little sad.  I told him that if he doesn't go out trick or treating he misses out on all of the candy.  I think he's going to re-think his decision :)

At what age is trick or treating NOT ok for your kids?  Take out poll here.