Amazon is rolling out new celebrity voices for Alexa, starting with Samuel L. Jackson later this year. And yes, you can choose between clean and explicit versions. They're also using new technology to give the voices more natural-sounding speech patterns.
Have you heard about the guy in Iowa who held up a sign on ESPN asking for beer money that turned into him raising $1 million for charity? Well... a newspaper looked through his Twitter history, and it turns out he posted two racist tweets back in 2012 when he was 16. He apologized.