What's the max age limit you employ?

[Heatman]

In as much as it's very important to hire the best qualified staff for your business, it's very important to hire those who are going to respect your authority. This is why I believe it's important to have a specific age limit of workers to be hired in any workplace. You shouldn't employ who will be looking at you like a kid and his or her subordinate. 

What's the max age limit you employ in your business?