Modern dragons don’t react well to to human authority. To say that they have a rebellious streak is a bit of an understatement. They remember a time when they answered to no one and held sway over all they surveyed. They may no longer be able to unleash wanton destruction upon any a passer by. However they will not pass up the opportunity to register their displeasure at mankind’s more oppressive rules.
KEEP OFF GRASS!
The Modern Dragon 
Love how smug he looks, and his strut! xD