When I lived in Florida, people joked that it was tourist season, kind of like hunting season, but people get all upset if you shoot them. And they tended to get lost or go partying in the wrong places, and still they came.
Here it is tourist season, the locals just caution, don't feed them buns and things, it only encourages them, they become dependent if we make it too easy for them to find food, or bathrooms, or the entrances to the subway stations (the subway stations are notoriously hard to find in Washington DC.)
It can be a pretty time of the year to go sightseeing. Sit among the monuments and you never know what you might see going by.