Or, more generously, just young and immature and not completely cognizant of the impact of your actions on others.

In a different lifetime I had a few bikes including a TL1000R that was just plain intoxicating to ride with aftermarket pipes.

There is no way in hell I could do that to my neighbors at this stage of my life, however, and I often cringe at the actions of my younger self. Nowadays, I refuse to even use gas powered garden tools for noise (and environmental) reasons.