The original logo of Starbucks was controversial.
Chances are good that you know that the Starbucks logo is a mermaid, even if you never buy coffee there. The mermaid, though, is actually a siren. Before 1987, it was super controversial, because the siren was naked and had exposed nipples. In 1992, they changed it to be a little more covered up.
The phrase "X-Files" refers to all of the conspiracy theory fodder that the FBI is secretly working on.