Exactly! That drives me crazy! Even though they are strong, I think it is easy to control oneself. I am sure that if they have a baby, the won't squash their child like that, so they can control their strength. Guess it is just another way of showing off to feel cool.
Some buff dudes I know always shake hands as if their palm could not be relaxed, and the only purpose of their lives is to squash your hand. Is it that with all the weight training they can not control their hands, or they are just assholes?