Anyone else read Roadside Picnic?

The title of the novel derives from an analogy that is proposed by the character Dr. Valentine Pilman, who compares the Visitation to a picnic:

A picnic. Picture a forest, a country road, a meadow. Cars drive off the country road into the meadow, a group of young people get out carrying bottles, baskets of food, transistor radios, and cameras. They light fires, pitch tents, turn on the music. In the morning they leave. The animals, birds, and insects that watched in horror through the long night creep out from their hiding places. And what do they see? Old spark plugs and old filters strewn around... Rags, burnt-out bulbs, and a monkey wrench left behind... And of course, the usual mess—apple cores, candy wrappers, charred remains of the campfire, cans, bottles, somebody’s handkerchief, somebody’s penknife, torn newspapers, coins, faded flowers picked in another meadow.[7]

In this analogy, the nervous animals are the humans who venture forth after the Visitors have left, discovering items and anomalies that are ordinary to those who have discarded them, but incomprehensible or deadly to the earthlings. The explanation implies that the Visitors may not have paid any attention to or even noticed Earth's inhabitants during their visit, just as many humans do not notice or pay attention to insects and wildlife during a picnic. The artifacts and phenomena that are left behind by the Visitors in the Zones were garbage, which are discarded and forgotten without any intentions to advance or damage humanity. There is little chance that the Visitors will return again because for them it was a brief stop, for reasons unknown, on the way to their actual destination.