[They] really DO go through our trash:

Scale of operations

When Nixon came to office in 1969, existing domestic surveillance activities were consolidated into Operation CHAOS.[5] Operation CHAOS first used CIA stations abroad to report on antiwar activities of American citizens traveling abroad, employing methods such as physical surveillance and electronic eavesdropping, utilizing "liaison services" in maintaining such surveillance. The operations were later expanded to include 60 officers.[3] In 1969, following the expansion, the operation began developing its own network of informants for the purposes of infiltrating various foreign antiwar groups located in foreign countries that might have ties to domestic groups.[2] Eventually, CIA officers expanded the program to include other leftist or counter-cultural groups with no discernible connection to Vietnam, such as groups operating within the women's liberation movement.[1] The domestic spying of Operation CHAOS also targeted the Israeli embassy, and domestic Jewish groups such as the B'nai B'rith. In order to gather intelligence on the embassy and B'nai B'rith,the CIA purchased a garbage collection company to collect documents that were to be destroyed.[6]

https://en.wikipedia.org/wiki/Operation_CHAOS