I think some are ok, some arent.
For instance, I was walking back to our building after running some errands and this bozo got onto his a Harley outside a coffee shop. When he got the thing started it was so loud it hurt my ears. Then, for effect, he revved it unnecessarily high, and rolled to the robot.
Now, he irritated he because it seemed that he was trying to prove to the world that he was "Hard".
Alternatively, I dont have a problem with people who use Harleys on the weekend for breakfast runs, and generally to de-stress. They ride them not be be "macho", but rather for the enjoyment thereof - much as one who would run a impractical sports car over the weekend.