Better to be strong and proportionately muscled, rather than freakishly big in the arms as an obvious result of 'roid abuse: that way, you can still get the drop on people if you've got to.
Walking around like that... it's stupid! It's like walking around with a big sign around your neck saying, "Hey, I'm a big tough bastard- best whizz out the Mexican boxing glove if you want to tangle with me!"
Mind you, the benefits of getting in proper shape (as opposed to being a little out of it)... I couldn't even begin to count the ways that it's a great idea.