I think for some they were like that to start with -big muscles makes them worse.
I think I did it myself at some point - then I realized that most the world thinks bodybuilders are pseudo gay, drug addicts, with fucked up personality disororders and my ego kinda deflated.
I love bodybuilding and love doing it but now I generally try as hard as I can to hide it in public, big shirts, pullovers, hoodies, baggie jeans, sweats or shorts.
I pretty much dont even like to show myself in the gym physically any more.
Now that I understand how Im percieved as a 'bodybuilder' I am a lot more humble about it, its nothing to brag about - although I am proud of my own personal accomplishments.
Most the world around me could care less and thinks its silly anyways. Besides, I think Id rather be stinking rich anyways.
But with big muscles lol.