How Old is Too Old to Trick or Treat? [POLL]

Halloween is next week! I love getting dressed up and handing out candy, but every once and a while, I'll have a trick or treater that seems a bit old to be asking for candy.

Once year, a guy showed up at my house and he must have been at least 6'2" and he was built like a linebacker! I guess the trick was on me, cause it kinda freaked me out and I ended up practically giving him all the candy. I really did want a trick from that guy!

So how old is too old?