Trick-or-Treating – ‘How Old is Too Old?’ [VIDEO]

So my wife has a long history of making our kids' Halloween costumes.  We have a couple of large totes downstairs that are full of costumes to prove it.  We typically steer clear of anything grotesque or scary and try to keep it creative or funny. Last year my daughter went as Facebook. 

I know what you're wondering and yes,  we have reused the costumes for our younger kids.  Why throw away money; all they care about is the candy anyway.  My wife is a whiz at costume-making.  Seriously, she could do it as a side business to her other side businesses.  I'm a 12 year old at heart and although I never thought I would, I've kind of grown out of the dressing up for Halloween thing.  I get more enjoyment out of dressing up the kids and taking them out.

I don't think there's an age limit to dressing up.  We all still like to do that once in a while, right?  This year I have a teenager who still wants to dress up and go trick or treating, which begs the question - 'How old is too old to go trick-or-treating?' Is there a point where instead you get together for a costume party with your friends instead of heading out door to door?  Should I just let her go until she doesn't want to anymore?  I know my answer but I'm looking for input. 

What do you think?  Let me know on Facebook?