[noonespecial]

No, people are fragile. They can have underlying health problems no matter what their age. Broken bones, recent surgeries etc.

If you're going to go up to someone and grab hold of them you have a responsibility to make sure you won't hurt them. It is my opinion that you should just never do this to someone you don't know.

[khafra]

Yup. Last Thursday I watched a co-worker grit his teeth in pain when someone came up and gave him a friendly slap on the shoulder that had just undergone rotator cuff surgery. I personally give big, hearty hugs; but only to people I massage or spar with.